diff --git a/.gitignore b/.gitignore
index 540743b71..eea2f7835 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,7 +35,7 @@ pack_*/
 rules.ninja
 testrunner\[1\]_include.cmake
 
-src/game/generated
+generated
 
 .cproject
 .project
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bff3fa189..0c34517c0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,11 @@ else()
   endif()
 endif()
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake)
+set(ORIGINAL_CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH})
+set(ORIGINAL_CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
+set(ORIGINAL_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
+set(OWN_CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake)
+set(CMAKE_MODULE_PATH ${OWN_CMAKE_MODULE_PATH})
 
 if(CMAKE_SIZEOF_VOID_P EQUAL 8)
   set(TARGET_BITS "64")
@@ -149,8 +153,62 @@ if(NOT MSVC)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-unused-parameter)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-missing-field-initializers)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wformat=2) # Warn about format strings.
+  add_c_compiler_flag_if_supported(OUR_FLAGS_DEP -Wno-implicit-function-declaration)
 endif()
 
+if(NOT MSVC)
+  check_c_compiler_flag("-O2;-Wp,-Werror;-D_FORTIFY_SOURCE=2" DEFINE_FORTIFY_SOURCE) # Some distributions define _FORTIFY_SOURCE by themselves.
+endif()
+
+########################################################################
+# COMMON FUNCTIONS
+########################################################################
+
+function(set_glob VAR GLOBBING DIRECTORY) # ...
+  file(${GLOBBING} GLOB_RESULT "${DIRECTORY}/*.c" "${DIRECTORY}/*.cpp" "${DIRECTORY}/*.h")
+  list(SORT GLOB_RESULT)
+  set(FILES)
+  foreach(file ${ARGN})
+    list(APPEND FILES "${PROJECT_SOURCE_DIR}/${DIRECTORY}/${file}")
+  endforeach()
+
+  if(NOT FILES STREQUAL GLOB_RESULT)
+    message(AUTHOR_WARNING "${VAR} does not contain every file from directory ${DIRECTORY}")
+    set(LIST_BUT_NOT_GLOB)
+    if(POLICY CMP0057)
+      cmake_policy(SET CMP0057 NEW)
+      foreach(file ${FILES})
+        if(NOT file IN_LIST GLOB_RESULT)
+          list(APPEND LIST_BUT_NOT_GLOB ${file})
+        endif()
+      endforeach()
+      if(LIST_BUT_NOT_GLOB)
+        message(AUTHOR_WARNING "Entries only present in ${VAR}: ${LIST_BUT_NOT_GLOB}")
+      endif()
+      set(GLOB_BUT_NOT_LIST)
+      foreach(file ${GLOB_RESULT})
+        if(NOT file IN_LIST FILES)
+          list(APPEND GLOB_BUT_NOT_LIST ${file})
+        endif()
+      endforeach()
+      if(GLOB_BUT_NOT_LIST)
+        message(AUTHOR_WARNING "Entries only present in ${DIRECTORY}: ${GLOB_BUT_NOT_LIST}")
+      endif()
+    endif()
+  endif()
+
+  set(${VAR} ${FILES} PARENT_SCOPE)
+endfunction()
+
+########################################################################
+# INITALIZE TARGET LISTS
+########################################################################
+
+set(TARGETS_OWN)
+set(TARGETS_DEP)
+
+set(TARGETS_LINK) # Targets with a linking stage.
+
 ########################################################################
 # DEPENDENCIES
 ########################################################################
@@ -203,11 +261,13 @@ if(NOT CMAKE_CROSSCOMPILING)
   # quietly.
   find_package(PkgConfig)
 endif()
+find_package(ZLIB)
 find_package(Curl)
 find_package(Freetype)
 if(DOWNLOAD_GTEST)
   find_package(Git)
 endif()
+find_package(GLEW)
 find_package(GTest)
 if(MYSQL)
   find_package(MySQL)
@@ -217,14 +277,11 @@ endif()
 find_package(Ogg)
 find_package(Opus)
 find_package(Opusfile)
+find_package(Pnglite)
 find_package(PythonInterp)
 find_package(SDL2)
 find_package(Threads)
-if(NOT PREFER_BUNDLED_LIBS)
-  find_package(ZLIB)
-else()
-  set(ZLIB_FOUND NO)
-endif()
+find_package(Wavpack)
 
 if(TARGET_OS AND TARGET_OS STREQUAL "mac")
   find_program(DMG dmg)
@@ -245,44 +302,42 @@ message(STATUS "Compiler: ${CMAKE_CXX_COMPILER}")
 message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
 
 message(STATUS "Dependencies:")
-function(show_dependency_status NAME FOUND PATH)
-  if(FOUND)
-    is_bundled(IS_BUNDLED "${PATH}")
-    if(IS_BUNDLED)
-      message(STATUS " * ${NAME} not found (using bundled version)")
+function(show_dependency_status OUTPUT_NAME NAME)
+  if(${NAME}_FOUND)
+    if(${NAME}_BUNDLED)
+      message(STATUS " * ${OUTPUT_NAME} not found (using bundled version)")
     else()
-      message(STATUS " * ${NAME} found")
+      message(STATUS " * ${OUTPUT_NAME} found")
     endif()
   else()
-    message(STATUS " * ${NAME} not found")
+    message(STATUS " * ${OUTPUT_NAME} not found")
   endif()
 endfunction()
 
-show_dependency_status("Curl" ${CURL_FOUND} "${CURL_LIBRARY}")
+show_dependency_status("Curl" CURL)
 if(TARGET_OS AND TARGET_OS STREQUAL "mac")
-  show_dependency_status("Dmg tools" ${DMGTOOLS_FOUND} "")
+  show_dependency_status("Dmg tools" DMGTOOLS)
 endif()
-show_dependency_status("Freetype" ${FREETYPE_FOUND} "${FREETYPE_LIBRARY}")
+show_dependency_status("Freetype" FREETYPE)
 if(DOWNLOAD_GTEST)
-  show_dependency_status("Git" ${GIT_FOUND} "${GIT_EXECUTABLE}")
+  show_dependency_status("Git" GIT)
 endif()
-show_dependency_status("GTest" ${GTEST_FOUND} "${GTEST_LIBRARY}")
+show_dependency_status("Glew" GLEW)
+show_dependency_status("GTest" GTEST)
 if(TARGET_OS AND TARGET_OS STREQUAL "mac")
-  show_dependency_status("Hdiutil" ${HDIUTIL} "")
+  show_dependency_status("Hdiutil" HDIUTIL)
 endif()
 if(MYSQL)
-  show_dependency_status("MySQL" ${MYSQL_FOUND} "${MYSQL_LIBRARY}")
-endif()
-show_dependency_status("Ogg" ${OGG_FOUND} "${OGG_INCLUDEDIR}")
-show_dependency_status("Opus" ${OPUS_FOUND} "${OPUS_INCLUDEDIR}")
-show_dependency_status("Opusfile" ${OPUSFILE_FOUND} "${OPUSFILE_LIBRARY}")
-show_dependency_status("PythonInterp" ${PYTHONINTERP_FOUND} "")
-show_dependency_status("SDL2" ${SDL2_FOUND} "${SDL2_LIBRARY}")
-if(ZLIB_FOUND)
-  message(STATUS " * Zlib found")
-else()
-  message(STATUS " * Zlib not found (using bundled version)")
+  show_dependency_status("MySQL" MYSQL)
 endif()
+show_dependency_status("Ogg" OGG)
+show_dependency_status("Opus" OPUS)
+show_dependency_status("Opusfile" OPUSFILE)
+show_dependency_status("Pnglite" PNGLITE)
+show_dependency_status("PythonInterp" PYTHONINTERP)
+show_dependency_status("SDL2" SDL2)
+show_dependency_status("Wavpack" WAVPACK)
+show_dependency_status("Zlib" ZLIB)
 
 if(NOT(PYTHONINTERP_FOUND))
   message(SEND_ERROR "You must install Python to compile DDNet")
@@ -350,10 +405,6 @@ else()
   endif()
 endif()
 
-if(NOT MSVC)
-  check_c_compiler_flag("-O2;-Wp,-Werror;-D_FORTIFY_SOURCE=2" DEFINE_FORTIFY_SOURCE) # Some distributions define _FORTIFY_SOURCE by themselves.
-endif()
-
 ########################################################################
 # DOWNLOAD GTEST
 ########################################################################
@@ -364,7 +415,7 @@ if(NOT(GTEST_FOUND) AND DOWNLOAD_GTEST)
   configure_file(cmake/Download_GTest_CMakeLists.txt.in googletest-download/CMakeLists.txt)
   execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
     RESULT_VARIABLE result
-    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-download
+    WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/googletest-download
   )
   if(result)
     message(WARNING "CMake step for googletest failed: ${result}")
@@ -372,7 +423,7 @@ if(NOT(GTEST_FOUND) AND DOWNLOAD_GTEST)
   else()
     execute_process(COMMAND ${CMAKE_COMMAND} --build .
       RESULT_VARIABLE result
-      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-download
+      WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/googletest-download
     )
     if(result)
       message(WARNING "Build step for googletest failed: ${result}")
@@ -383,8 +434,8 @@ if(NOT(GTEST_FOUND) AND DOWNLOAD_GTEST)
 
       # Add googletest directly to our build. This defines the gtest target.
       add_subdirectory(
-        ${CMAKE_BINARY_DIR}/googletest-src
-        ${CMAKE_BINARY_DIR}/googletest-build
+        ${PROJECT_BINARY_DIR}/googletest-src
+        ${PROJECT_BINARY_DIR}/googletest-build
         EXCLUDE_FROM_ALL
       )
 
@@ -406,132 +457,17 @@ if(NOT(GTEST_FOUND) AND DOWNLOAD_GTEST)
   endif()
 endif()
 
-########################################################################
-# INITALIZE TARGET LISTS
-########################################################################
-
-set(TARGETS_OWN)
-set(TARGETS_DEP)
-
-set(TARGETS_LINK) # Targets with a linking stage.
-
-########################################################################
-# COMMON FUNCTIONS
-########################################################################
-
-function(set_glob VAR GLOBBING DIRECTORY) # ...
-  file(${GLOBBING} GLOB_RESULT "${DIRECTORY}/*.c" "${DIRECTORY}/*.cpp" "${DIRECTORY}/*.h")
-  list(SORT GLOB_RESULT)
-  set(FILES)
-  foreach(file ${ARGN})
-    list(APPEND FILES "${PROJECT_SOURCE_DIR}/${DIRECTORY}/${file}")
-  endforeach()
-
-  if(NOT FILES STREQUAL GLOB_RESULT)
-    message(AUTHOR_WARNING "${VAR} does not contain every file from directory ${DIRECTORY}")
-    set(LIST_BUT_NOT_GLOB)
-    if(POLICY CMP0057)
-      cmake_policy(SET CMP0057 NEW)
-      foreach(file ${FILES})
-        if(NOT file IN_LIST GLOB_RESULT)
-          list(APPEND LIST_BUT_NOT_GLOB ${file})
-        endif()
-      endforeach()
-      if(LIST_BUT_NOT_GLOB)
-        message(AUTHOR_WARNING "Entries only present in ${VAR}: ${LIST_BUT_NOT_GLOB}")
-      endif()
-      set(GLOB_BUT_NOT_LIST)
-      foreach(file ${GLOB_RESULT})
-        if(NOT file IN_LIST FILES)
-          list(APPEND GLOB_BUT_NOT_LIST ${file})
-        endif()
-      endforeach()
-      if(GLOB_BUT_NOT_LIST)
-        message(AUTHOR_WARNING "Entries only present in ${DIRECTORY}: ${GLOB_BUT_NOT_LIST}")
-      endif()
-    endif()
-  endif()
-
-  set(${VAR} ${FILES} PARENT_SCOPE)
-endfunction()
-
 ########################################################################
 # DEPENDENCY COMPILATION
 ########################################################################
 
-if(NOT(ZLIB_FOUND))
-  set(ZLIB_LIBRARIES)
-  set_glob(ZLIB_SRC GLOB src/engine/external/zlib
-    adler32.c
-    compress.c
-    crc32.c
-    crc32.h
-    deflate.c
-    deflate.h
-    gzclose.c
-    gzguts.h
-    gzlib.c
-    gzread.c
-    gzwrite.c
-    infback.c
-    inffast.c
-    inffast.h
-    inffixed.h
-    inflate.c
-    inflate.h
-    inftrees.c
-    inftrees.h
-    trees.c
-    trees.h
-    uncompr.c
-    zconf.h
-    zlib.h
-    zutil.c
-    zutil.h
-  )
-  add_library(zlib EXCLUDE_FROM_ALL OBJECT ${ZLIB_SRC})
-
-  list(APPEND TARGETS_DEP zlib)
-  set(ZLIB_INCLUDEDIR src/engine/external/zlib/)
-  set(DEP_ZLIB $<TARGET_OBJECTS:zlib>)
-else()
-  set(ZLIB_INCLUDEDIR)
-  set(DEP_ZLIB)
-endif()
-
-set_glob(DEP_PNG_SRC GLOB src/engine/external/pnglite pnglite.c pnglite.h)
-add_library(png OBJECT EXCLUDE_FROM_ALL ${DEP_PNG_SRC})
-target_include_directories(png PRIVATE ${ZLIB_INCLUDEDIR})
-
-set(DEP_PNG $<TARGET_OBJECTS:png>)
-list(APPEND TARGETS_DEP png)
-
-set_glob(DEP_GLEW_SRC GLOB src/engine/external/glew glew.c)
-set_glob(DEP_GLEW_INCLUDES GLOB src/engine/external/glew/GL eglew.h glew.h glxew.h wglew.h)
-add_library(glew OBJECT EXCLUDE_FROM_ALL ${DEP_GLEW_SRC} ${DEP_GLEW_INCLUDES})
-target_include_directories(glew PRIVATE src/engine/external/glew)
-
-set(DEP_GLEW $<TARGET_OBJECTS:glew>)
-list(APPEND TARGETS_DEP glew)
-
 if(CLIENT)
   # Static dependencies
-  set_glob(DEP_JSON_SRC GLOB src/engine/external/json-parser json.c json.h)
-  set_glob(DEP_WAV_SRC GLOB src/engine/external/wavpack
-    bits.c
-    float.c
-    metadata.c
-    unpack.c
-    wavpack.h
-    words.c
-    wputils.c
-  )
-  add_library(json EXCLUDE_FROM_ALL OBJECT ${DEP_JSON_SRC})
-  add_library(wav EXCLUDE_FROM_ALL OBJECT ${DEP_WAV_SRC})
+  set_glob(JSON_SRC GLOB src/engine/external/json-parser json.c json.h)
+  add_library(json EXCLUDE_FROM_ALL OBJECT ${JSON_SRC})
 
-  list(APPEND TARGETS_DEP json wav)
-  set(DEP_JSON $<TARGET_OBJECTS:json>)
-  set(DEP_WAV $<TARGET_OBJECTS:wav>)
+  list(APPEND TARGETS_DEP json)
+  set(JSON_DEP $<TARGET_OBJECTS:json>)
 endif()
 
 ########################################################################
@@ -552,16 +488,18 @@ file(COPY ${COPY_FILES} DESTINATION .)
 ########################################################################
 
 function(chash output_file)
-  add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/${output_file}
-    COMMAND ${PYTHON_EXECUTABLE} scripts/cmd5.py ${ARGN} > ${output_file}
+  add_custom_command(OUTPUT ${output_file}
+    COMMAND ${PYTHON_EXECUTABLE} scripts/cmd5.py ${ARGN}
+      > "${PROJECT_BINARY_DIR}/${output_file}"
     DEPENDS scripts/cmd5.py ${ARGN}
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
   )
 endfunction()
 
 function(generate_source output_file script_parameter)
-  add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/${output_file}
-    COMMAND ${PYTHON_EXECUTABLE} datasrc/compile.py ${script_parameter} > ${output_file}
+  add_custom_command(OUTPUT ${output_file}
+    COMMAND ${PYTHON_EXECUTABLE} datasrc/compile.py ${script_parameter}
+      > "${PROJECT_BINARY_DIR}/${output_file}"
     DEPENDS
       datasrc/compile.py
       datasrc/content.py
@@ -571,10 +509,10 @@ function(generate_source output_file script_parameter)
   )
 endfunction()
 
-file(MAKE_DIRECTORY "${PROJECT_SOURCE_DIR}/src/game/generated/")
+file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/src/game/generated/")
 chash("src/game/generated/nethash.cpp"
   "src/engine/shared/protocol.h"
-  "src/game/generated/protocol.h"
+  "${PROJECT_BINARY_DIR}/src/game/generated/protocol.h"
   "src/game/tuning.h"
   "src/game/gamecore.cpp"
 )
@@ -761,7 +699,7 @@ else()
   set(DEP_WEBSOCKETS)
 endif()
 
-set(DEPS ${DEP_MD5} ${DEP_WEBSOCKETS} ${DEP_ZLIB})
+set(DEPS ${DEP_MD5} ${DEP_WEBSOCKETS} ${ZLIB_DEP})
 
 # Libraries
 set(LIBS ${CMAKE_THREAD_LIBS_INIT} ${ZLIB_LIBRARIES} ${PLATFORM_LIBS})
@@ -906,14 +844,17 @@ if(CLIENT)
   )
   set(CLIENT_SRC ${ENGINE_CLIENT} ${PLATFORM_CLIENT} ${GAME_CLIENT} ${GAME_EDITOR} ${GAME_GENERATED_CLIENT})
 
-  set(DEPS_CLIENT ${DEPS} ${DEP_JSON} ${DEP_PNG} ${DEP_WAV} ${DEP_GLEW})
+  set(DEPS_CLIENT ${DEPS} ${GLEW_DEP} ${JSON_DEP} ${PNGLITE_DEP} ${WAVPACK_DEP})
 
   # Libraries
   set(LIBS_CLIENT
     ${LIBS}
     ${CURL_LIBRARIES}
     ${FREETYPE_LIBRARIES}
+    ${GLEW_LIBRARIES}
+    ${PNGLITE_LIBRARIES}
     ${SDL2_LIBRARIES}
+    ${WAVPACK_LIBRARIES}
 
     # Order of these three is important.
     ${OPUSFILE_LIBRARIES}
@@ -950,11 +891,25 @@ if(CLIENT)
   target_include_directories(${TARGET_CLIENT} PRIVATE
     ${CURL_INCLUDE_DIRS}
     ${FREETYPE_INCLUDE_DIRS}
+    ${GLEW_INCLUDE_DIRS}
     ${OGG_INCLUDE_DIRS}
     ${OPUSFILE_INCLUDE_DIRS}
     ${OPUS_INCLUDE_DIRS}
+    ${PNGLITE_INCLUDE_DIRS}
     ${SDL2_INCLUDE_DIRS}
+    ${WAVPACK_INCLUDE_DIRS}
   )
+
+  set(CMAKE_REQUIRED_INCLUDES ${ORIGINAL_CMAKE_REQUIRED_INCLUDES} ${WAVPACK_INCLUDE_DIRS})
+  set(CMAKE_REQUIRED_LIBRARIES ${ORIGINAL_CMAKE_REQUIRED_LIBRARIES} ${WAVPACK_LIBRARIES})
+  check_symbol_exists(WavpackOpenFileInputEx64 wavpack.h WAVPACK_OPEN_FILE_INPUT_EX64)
+  set(CMAKE_REQUIRED_INCLUDES ${ORIGINAL_CMAKE_REQUIRED_INCLUDES})
+  set(CMAKE_REQUIRED_LIBRARIES ${ORIGINAL_CMAKE_REQUIRED_LIBRARIES})
+
+  if(WAVPACK_OPEN_FILE_INPUT_EX64)
+    target_compile_definitions(${TARGET_CLIENT} PRIVATE CONF_WAVPACK_OPEN_FILE_INPUT_EX64)
+  endif()
+
   list(APPEND TARGETS_OWN ${TARGET_CLIENT})
   list(APPEND TARGETS_LINK ${TARGET_CLIENT})
 endif()
@@ -1113,10 +1068,13 @@ foreach(ABS_T ${TOOLS})
   file(RELATIVE_PATH T "${PROJECT_SOURCE_DIR}/src/tools/" ${ABS_T})
   if(T MATCHES "\\.cpp$")
     string(REGEX REPLACE "\\.cpp$" "" TOOL "${T}")
-    set(EXTRA_TOOL_SRC)
+    set(TOOL_DEPS ${DEPS})
+    set(TOOL_LIBS ${LIBS})
     set(EXCLUDE_FROM_ALL EXCLUDE_FROM_ALL)
     if(TOOL MATCHES "^(tileset_.*|dilate|map_extract|map_replace_image)$")
-      list(APPEND EXTRA_TOOL_SRC ${DEP_PNG})
+      list(APPEND TOOL_DEPS ${PNGLITE_DEP})
+      list(APPEND TOOL_LIBS ${PNGLITE_LIBRARIES})
+      list(APPEND TOOL_INCLUDE_DIRS ${PNGLITE_INCLUDE_DIRS})
     endif()
     if(TOOL MATCHES "^config_")
       list(APPEND EXTRA_TOOL_SRC "src/tools/config_common.h")
@@ -1125,12 +1083,13 @@ foreach(ABS_T ${TOOLS})
       set(EXCLUDE_FROM_ALL)
     endif()
     add_executable(${TOOL} ${EXCLUDE_FROM_ALL}
-      ${DEPS}
+      ${TOOL_DEPS}
       src/tools/${TOOL}.cpp
       ${EXTRA_TOOL_SRC}
       $<TARGET_OBJECTS:engine-shared>
     )
-    target_link_libraries(${TOOL} ${LIBS})
+    target_include_directories(${TOOL} PRIVATE ${TOOL_INCLUDE_DIRS})
+    target_link_libraries(${TOOL} ${TOOL_LIBS})
     list(APPEND TARGETS_TOOLS ${TOOL})
   endif()
 endforeach()
@@ -1348,8 +1307,8 @@ endif()
 set(PACKAGE_TARGETS)
 
 if(DMGTOOLS_FOUND OR HDIUTIL)
-  file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/bundle/client/")
-  file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/bundle/server/")
+  file(MAKE_DIRECTORY bundle/client/)
+  file(MAKE_DIRECTORY bundle/server/)
   configure_file(other/bundle/client/Info.plist.in bundle/client/Info.plist)
   configure_file(other/bundle/server/Info.plist.in bundle/server/Info.plist)
 
@@ -1403,8 +1362,8 @@ if(DMGTOOLS_FOUND OR HDIUTIL)
       ${TARGET_CLIENT}
       ${TARGET_SERVER_LAUNCHER}
       ${TARGET_SERVER}
-      ${CMAKE_BINARY_DIR}/bundle/client/Info.plist
-      ${CMAKE_BINARY_DIR}/bundle/server/Info.plist
+      ${PROJECT_BINARY_DIR}/bundle/client/Info.plist
+      ${PROJECT_BINARY_DIR}/bundle/server/Info.plist
       data
       other/bundle/client/PkgInfo
       other/bundle/server/PkgInfo
@@ -1546,8 +1505,9 @@ foreach(target ${TARGETS_OWN})
     target_compile_options(${target} PRIVATE ${OUR_FLAGS_OWN})
   endif()
   target_include_directories(${target} PRIVATE src)
+  target_include_directories(${target} PRIVATE ${PROJECT_BINARY_DIR}/src)
   target_compile_definitions(${target} PRIVATE $<$<CONFIG:Debug>:CONF_DEBUG>)
-  target_include_directories(${target} PRIVATE ${ZLIB_INCLUDEDIR})
+  target_include_directories(${target} PRIVATE ${ZLIB_INCLUDE_DIRS})
   target_compile_definitions(${target} PRIVATE GLEW_STATIC)
   if(WEBSOCKETS)
     target_compile_definitions(${target} PRIVATE CONF_WEBSOCKETS)
@@ -1562,4 +1522,7 @@ foreach(target ${TARGETS_DEP})
   if(MSVC)
     target_compile_options(${target} PRIVATE /W0)
   endif()
+  if(OUR_FLAGS_DEP)
+    target_compile_options(${target} PRIVATE ${OUR_FLAGS_DEP})
+  endif()
 endforeach()
diff --git a/cmake/FindCurl.cmake b/cmake/FindCurl.cmake
index 355f0b607..ac001c95b 100644
--- a/cmake/FindCurl.cmake
+++ b/cmake/FindCurl.cmake
@@ -22,33 +22,34 @@ find_package_handle_standard_args(Curl DEFAULT_MSG CURL_LIBRARY CURL_INCLUDEDIR)
 
 mark_as_advanced(CURL_LIBRARY CURL_INCLUDEDIR)
 
-is_bundled(IS_BUNDLED "${CURL_LIBRARY}")
+if(CURL_FOUND)
+  is_bundled(CURL_BUNDLED "${CURL_LIBRARY}")
+  set(CURL_LIBRARIES ${CURL_LIBRARY})
+  set(CURL_INCLUDE_DIRS ${CURL_INCLUDEDIR})
+  if(CURL_BUNDLED AND TARGET_OS STREQUAL "linux")
+    find_library(CURL_LIBRARY_SSL
+      NAMES ssl
+      HINTS ${EXTRA_CURL_LIBDIR}
+    )
+    find_library(CURL_LIBRARY_CRYPTO
+      NAMES crypto
+      HINTS ${EXTRA_CURL_LIBDIR}
+    )
+    # If we don't add `dl`, we get a missing reference to `dlclose`:
+    # ```
+    # /usr/bin/ld: ../ddnet-libs/curl/linux/lib64/libcrypto.a(dso_dlfcn.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
+    # ```
+    #
+    # Order matters, SSL needs to be linked before CRYPTO, otherwise we also get
+    # undefined symbols.
+    list(APPEND CURL_LIBRARIES ${CURL_LIBRARY_SSL} ${CURL_LIBRARY_CRYPTO} dl)
+  endif()
 
-set(CURL_LIBRARIES ${CURL_LIBRARY})
-set(CURL_INCLUDE_DIRS ${CURL_INCLUDEDIR})
-if(IS_BUNDLED AND TARGET_OS STREQUAL "linux")
-  find_library(CURL_LIBRARY_SSL
-    NAMES ssl
-    HINTS ${EXTRA_CURL_LIBDIR}
-  )
-  find_library(CURL_LIBRARY_CRYPTO
-    NAMES crypto
-    HINTS ${EXTRA_CURL_LIBDIR}
-  )
-  # If we don't add `dl`, we get a missing reference to `dlclose`:
-  # ```
-  # /usr/bin/ld: ../ddnet-libs/curl/linux/lib64/libcrypto.a(dso_dlfcn.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
-  # ```
-  #
-  # Order matters, SSL needs to be linked before CRYPTO, otherwise we also get
-  # undefined symbols.
-  list(APPEND CURL_LIBRARIES ${CURL_LIBRARY_SSL} ${CURL_LIBRARY_CRYPTO} dl)
-endif()
-
-if(IS_BUNDLED AND TARGET_OS STREQUAL "windows")
-  set(CURL_COPY_FILES
-    "${EXTRA_CURL_LIBDIR}/libcurl.dll"
-  )
-else()
-  set(CURL_COPY_FILES)
+  if(CURL_BUNDLED AND TARGET_OS STREQUAL "windows")
+    set(CURL_COPY_FILES
+      "${EXTRA_CURL_LIBDIR}/libcurl.dll"
+    )
+  else()
+    set(CURL_COPY_FILES)
+  endif()
 endif()
diff --git a/cmake/FindFreetype.cmake b/cmake/FindFreetype.cmake
index 306ca414a..1e755d66a 100644
--- a/cmake/FindFreetype.cmake
+++ b/cmake/FindFreetype.cmake
@@ -24,12 +24,14 @@ find_package_handle_standard_args(Freetype DEFAULT_MSG FREETYPE_LIBRARY FREETYPE
 
 mark_as_advanced(FREETYPE_LIBRARY FREETYPE_INCLUDEDIR)
 
-set(FREETYPE_LIBRARIES ${FREETYPE_LIBRARY})
-set(FREETYPE_INCLUDE_DIRS ${FREETYPE_INCLUDEDIR})
+if(FREETYPE_FOUND)
+  set(FREETYPE_LIBRARIES ${FREETYPE_LIBRARY})
+  set(FREETYPE_INCLUDE_DIRS ${FREETYPE_INCLUDEDIR})
 
-is_bundled(IS_BUNDLED "${FREETYPE_LIBRARY}")
-if(IS_BUNDLED AND TARGET_OS STREQUAL "windows")
-  set(FREETYPE_COPY_FILES "${EXTRA_FREETYPE_LIBDIR}/libfreetype.dll")
-else()
-  set(FREETYPE_COPY_FILES)
+  is_bundled(FREETYPE_BUNDLED "${FREETYPE_LIBRARY}")
+  if(FREETYPE_BUNDLED AND TARGET_OS STREQUAL "windows")
+    set(FREETYPE_COPY_FILES "${EXTRA_FREETYPE_LIBDIR}/libfreetype.dll")
+  else()
+    set(FREETYPE_COPY_FILES)
+  endif()
 endif()
diff --git a/cmake/FindGLEW.cmake b/cmake/FindGLEW.cmake
index c8a30c316..b451dccc4 100644
--- a/cmake/FindGLEW.cmake
+++ b/cmake/FindGLEW.cmake
@@ -1,33 +1,29 @@
-if(NOT CMAKE_CROSSCOMPILING)
-  find_package(PkgConfig QUIET)
-  pkg_check_modules(PC_GLEW libglew)
+if(NOT PREFER_BUNDLED_LIBS)
+  set(CMAKE_MODULE_PATH ${ORIGINAL_CMAKE_MODULE_PATH})
+  find_package(GLEW)
+  set(CMAKE_MODULE_PATH ${OWN_CMAKE_MODULE_PATH})
+  if(GLEW_FOUND)
+    set(GLEW_BUNDLED OFF)
+    set(GLEW_DEP)
+  endif()
 endif()
 
-set_extra_dirs_lib(GLEW glew)
-find_library(GLEW_LIBRARY
-  NAMES GLEW glew32
-  HINTS ${HINTS_GLEW_LIBDIR} ${PC_GLEW_LIBDIR} ${PC_GLEW_LIBRARY_DIRS}
-  PATHS ${PATHS_GLEW_LIBDIR}
-  ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
-)
-set_extra_dirs_include(GLEW glew "${GLEW_LIBRARY}")
-find_path(GLEW_INCLUDEDIR GL
-  HINTS ${HINTS_GLEW_INCLUDEDIR} ${PC_GLEW_INCLUDEDIR} ${PC_GLEW_INCLUDE_DIRS}
-  PATHS ${PATHS_GLEW_INCLUDEDIR}
-  ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
-)
+if(NOT GLEW_FOUND)
+  set(GLEW_FOUND ON)
+  set(GLEW_BUNDLED ON)
+  set(GLEW_SRC_DIR src/engine/external/glew)
+  set_glob(GLEW_SRC GLOB ${GLEW_SRC_DIR} glew.c)
+  set_glob(GLEW_INCLUDES GLOB ${GLEW_SRC_DIR}/GL eglew.h glew.h glxew.h wglew.h)
+  add_library(glew EXCLUDE_FROM_ALL OBJECT ${GLEW_SRC} ${GLEW_INCLUDES})
+  set(GLEW_INCLUDEDIR ${GLEW_SRC_DIR})
+  target_include_directories(glew PRIVATE ${GLEW_INCLUDEDIR})
 
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(GLEW DEFAULT_MSG GLEW_LIBRARY GLEW_INCLUDEDIR)
+  set(GLEW_DEP $<TARGET_OBJECTS:glew>)
+  set(GLEW_INCLUDE_DIRS ${GLEW_INCLUDEDIR})
+  set(GLEW_LIBRARIES)
 
-mark_as_advanced(GLEW_LIBRARY GLEW_INCLUDEDIR)
+  list(APPEND TARGETS_DEP glew)
 
-set(GLEW_LIBRARIES ${GLEW_LIBRARY})
-set(GLEW_INCLUDE_DIRS ${GLEW_INCLUDEDIR})
-
-is_bundled(IS_BUNDLED "${GLEW_LIBRARY}")
-if(IS_BUNDLED AND TARGET_OS STREQUAL "windows")
-  set(GLEW_COPY_FILES "${EXTRA_GLEW_LIBDIR}/glew32.dll")
-else()
-  set(GLEW_COPY_FILES)
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(GLEW DEFAULT_MSG GLEW_INCLUDEDIR)
 endif()
diff --git a/cmake/FindMySQL.cmake b/cmake/FindMySQL.cmake
index f4e451dcf..9fce30338 100644
--- a/cmake/FindMySQL.cmake
+++ b/cmake/FindMySQL.cmake
@@ -69,7 +69,11 @@ find_path(MYSQL_CPPCONN_INCLUDEDIR
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(MySQL DEFAULT_MSG MYSQL_LIBRARY MYSQL_INCLUDEDIR)
 
-set(MYSQL_LIBRARIES ${MYSQL_LIBRARY} ${MYSQL_CPPCONN_LIBRARY})
-set(MYSQL_INCLUDE_DIRS ${MYSQL_INCLUDEDIR} ${MYSQL_CPPCONN_INCLUDEDIR})
+if(MYSQL_FOUND)
+  is_bundled(MYSQL_BUNDLED "${MYSQL_LIBRARY}")
 
-mark_as_advanced(MYSQL_INCLUDEDIR MYSQL_LIBRARY)
+  set(MYSQL_LIBRARIES ${MYSQL_LIBRARY} ${MYSQL_CPPCONN_LIBRARY})
+  set(MYSQL_INCLUDE_DIRS ${MYSQL_INCLUDEDIR} ${MYSQL_CPPCONN_INCLUDEDIR})
+
+  mark_as_advanced(MYSQL_INCLUDEDIR MYSQL_LIBRARY)
+endif()
diff --git a/cmake/FindOgg.cmake b/cmake/FindOgg.cmake
index 7a6705428..44496b491 100644
--- a/cmake/FindOgg.cmake
+++ b/cmake/FindOgg.cmake
@@ -23,9 +23,11 @@ find_package_handle_standard_args(Ogg DEFAULT_MSG OGG_INCLUDEDIR)
 
 mark_as_advanced(OGG_INCLUDEDIR OGG_LIBRARY)
 
-set(OGG_INCLUDE_DIRS ${OGG_INCLUDEDIR})
-if(OGG_LIBRARY)
-  set(OGG_LIBRARIES ${OGG_LIBRARY})
-else()
-  set(OGG_LIBRARIES)
+if(OGG_FOUND)
+  set(OGG_INCLUDE_DIRS ${OGG_INCLUDEDIR})
+  if(OGG_LIBRARY)
+    set(OGG_LIBRARIES ${OGG_LIBRARY})
+  else()
+    set(OGG_LIBRARIES)
+  endif()
 endif()
diff --git a/cmake/FindOpus.cmake b/cmake/FindOpus.cmake
index fe117e98c..37c07a2a4 100644
--- a/cmake/FindOpus.cmake
+++ b/cmake/FindOpus.cmake
@@ -23,9 +23,11 @@ find_package_handle_standard_args(Opus DEFAULT_MSG OPUS_INCLUDEDIR)
 
 mark_as_advanced(OPUS_INCLUDEDIR OPUS_LIBRARY)
 
-set(OPUS_INCLUDE_DIRS ${OPUS_INCLUDEDIR})
-if(OPUS_LIBRARY)
-  set(OPUS_LIBRARIES ${OPUS_LIBRARY})
-else()
-  set(OPUS_LIBRARIES)
+if(OPUS_FOUND)
+  set(OPUS_INCLUDE_DIRS ${OPUS_INCLUDEDIR})
+  if(OPUS_LIBRARY)
+    set(OPUS_LIBRARIES ${OPUS_LIBRARY})
+  else()
+    set(OPUS_LIBRARIES)
+  endif()
 endif()
diff --git a/cmake/FindOpusfile.cmake b/cmake/FindOpusfile.cmake
index e3d9b01a0..39a3f0878 100644
--- a/cmake/FindOpusfile.cmake
+++ b/cmake/FindOpusfile.cmake
@@ -26,19 +26,21 @@ mark_as_advanced(OPUSFILE_LIBRARY OPUSFILE_INCLUDEDIR)
 set(OPUSFILE_LIBRARIES ${OPUSFILE_LIBRARY})
 set(OPUSFILE_INCLUDE_DIRS ${OPUSFILE_INCLUDEDIR})
 
-is_bundled(IS_BUNDLED "${OPUSFILE_LIBRARY}")
-if(IS_BUNDLED AND TARGET_OS STREQUAL "windows")
-  set(OPUSFILE_COPY_FILES
-    "${EXTRA_OPUSFILE_LIBDIR}/libogg.dll"
-    "${EXTRA_OPUSFILE_LIBDIR}/libopus.dll"
-    "${EXTRA_OPUSFILE_LIBDIR}/libopusfile.dll"
-    "${EXTRA_OPUSFILE_LIBDIR}/libwinpthread-1.dll"
-  )
-  if(TARGET_BITS EQUAL 32)
-    list(APPEND OPUSFILE_COPY_FILES
-      "${EXTRA_OPUSFILE_LIBDIR}/libgcc_s_sjlj-1.dll"
+if(OPUSFILE_FOUND)
+  is_bundled(OPUSFILE_BUNDLED "${OPUSFILE_LIBRARY}")
+  if(OPUSFILE_BUNDLED AND TARGET_OS STREQUAL "windows")
+    set(OPUSFILE_COPY_FILES
+      "${EXTRA_OPUSFILE_LIBDIR}/libogg.dll"
+      "${EXTRA_OPUSFILE_LIBDIR}/libopus.dll"
+      "${EXTRA_OPUSFILE_LIBDIR}/libopusfile.dll"
+      "${EXTRA_OPUSFILE_LIBDIR}/libwinpthread-1.dll"
     )
+    if(TARGET_BITS EQUAL 32)
+      list(APPEND OPUSFILE_COPY_FILES
+        "${EXTRA_OPUSFILE_LIBDIR}/libgcc_s_sjlj-1.dll"
+      )
+    endif()
+  else()
+    set(OPUSFILE_COPY_FILES)
   endif()
-else()
-  set(OPUSFILE_COPY_FILES)
 endif()
diff --git a/cmake/FindPnglite.cmake b/cmake/FindPnglite.cmake
new file mode 100644
index 000000000..b011a5011
--- /dev/null
+++ b/cmake/FindPnglite.cmake
@@ -0,0 +1,46 @@
+if(NOT PREFER_BUNDLED_LIBS)
+  if(NOT CMAKE_CROSSCOMPILING)
+    find_package(PkgConfig QUIET)
+    pkg_check_modules(PC_PNGLITE pnglite)
+  endif()
+
+  find_library(PNGLITE_LIBRARY
+    NAMES pnglite
+    HINTS ${PC_PNGLITE_LIBDIR} ${PC_PNGLITE_LIBRARY_DIRS}
+    ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
+  )
+  find_path(PNGLITE_INCLUDEDIR
+    NAMES pnglite.h
+    HINTS ${PC_PNGLITE_INCLUDEDIR} ${PC_PNGLITE_INCLUDE_DIRS}
+    ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
+  )
+
+  mark_as_advanced(PNGLITE_LIBRARY PNGLITE_INCLUDEDIR)
+
+  if(PNGLITE_LIBRARY AND PNGLITE_INCLUDEDIR)
+    include(FindPackageHandleStandardArgs)
+    find_package_handle_standard_args(Pnglite DEFAULT_MSG PNGLITE_LIBRARY PNGLITE_INCLUDEDIR)
+
+    set(PNGLITE_LIBRARIES ${PNGLITE_LIBRARY})
+    set(PNGLITE_INCLUDE_DIRS ${PNGLITE_INCLUDEDIR})
+    set(PNGLITE_BUNDLED OFF)
+  endif()
+endif()
+
+if(NOT PNGLITE_FOUND)
+  set(PNGLITE_SRC_DIR src/engine/external/pnglite)
+  set_glob(PNGLITE_SRC GLOB ${PNGLITE_SRC_DIR} pnglite.c pnglite.h)
+  add_library(pnglite EXCLUDE_FROM_ALL OBJECT ${PNGLITE_SRC})
+  list(APPEND TARGETS_DEP pnglite)
+
+  set(PNGLITE_INCLUDEDIR ${PNGLITE_SRC_DIR})
+  target_include_directories(pnglite PRIVATE ${ZLIB_INCLUDE_DIRS})
+
+  set(PNGLITE_DEP $<TARGET_OBJECTS:pnglite>)
+  set(PNGLITE_INCLUDE_DIRS ${PNGLITE_INCLUDEDIR})
+  set(PNGLITE_LIBRARIES)
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(Pnglite DEFAULT_MSG PNGLITE_INCLUDEDIR)
+  set(PNGLITE_BUNDLED ON)
+endif()
diff --git a/cmake/FindSDL2.cmake b/cmake/FindSDL2.cmake
index 6c5bf0880..dbd3edaa5 100644
--- a/cmake/FindSDL2.cmake
+++ b/cmake/FindSDL2.cmake
@@ -25,12 +25,14 @@ find_package_handle_standard_args(SDL2 DEFAULT_MSG SDL2_LIBRARY SDL2_INCLUDEDIR)
 
 mark_as_advanced(SDL2_LIBRARY SDL2_INCLUDEDIR)
 
-set(SDL2_LIBRARIES ${SDL2_LIBRARY})
-set(SDL2_INCLUDE_DIRS ${SDL2_INCLUDEDIR})
+if(SDL2_FOUND)
+  set(SDL2_LIBRARIES ${SDL2_LIBRARY})
+  set(SDL2_INCLUDE_DIRS ${SDL2_INCLUDEDIR})
 
-is_bundled(IS_BUNDLED "${SDL2_LIBRARY}")
-if(IS_BUNDLED AND TARGET_OS STREQUAL "windows")
-  set(SDL2_COPY_FILES "${EXTRA_SDL2_LIBDIR}/SDL2.dll")
-else()
-  set(SDL2_COPY_FILES)
+  is_bundled(SDL2_BUNDLED "${SDL2_LIBRARY}")
+  if(SDL2_BUNDLED AND TARGET_OS STREQUAL "windows")
+    set(SDL2_COPY_FILES "${EXTRA_SDL2_LIBDIR}/SDL2.dll")
+  else()
+    set(SDL2_COPY_FILES)
+  endif()
 endif()
diff --git a/cmake/FindWavpack.cmake b/cmake/FindWavpack.cmake
new file mode 100644
index 000000000..086902ca7
--- /dev/null
+++ b/cmake/FindWavpack.cmake
@@ -0,0 +1,52 @@
+if(NOT PREFER_BUNDLED_LIBS)
+  if(NOT CMAKE_CROSSCOMPILING)
+    find_package(PkgConfig QUIET)
+    pkg_check_modules(PC_WAVPACK wavpack)
+  endif()
+
+  find_library(WAVPACK_LIBRARY
+    NAMES wavpack
+    HINTS ${PC_WAVPACK_LIBDIR} ${PC_WAVPACK_LIBRARY_DIRS}
+    ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
+  )
+  find_path(WAVPACK_INCLUDEDIR
+    NAMES wavpack.h
+    PATH_SUFFIXES wavpack
+    HINTS ${PC_WAVPACK_INCLUDEDIR} ${PC_WAVPACK_INCLUDE_DIRS}
+    ${CROSSCOMPILING_NO_CMAKE_SYSTEM_PATH}
+  )
+
+  mark_as_advanced(WAVPACK_LIBRARY WAVPACK_INCLUDEDIR)
+
+  if(WAVPACK_LIBRARY AND WAVPACK_INCLUDEDIR)
+    include(FindPackageHandleStandardArgs)
+    find_package_handle_standard_args(Wavpack DEFAULT_MSG WAVPACK_LIBRARY WAVPACK_INCLUDEDIR)
+
+    set(WAVPACK_LIBRARIES ${WAVPACK_LIBRARY})
+    set(WAVPACK_INCLUDE_DIRS ${WAVPACK_INCLUDEDIR})
+    set(WAVPACK_BUNDLED OFF)
+  endif()
+endif()
+
+if(NOT WAVPACK_FOUND)
+  set(WAVPACK_SRC_DIR src/engine/external/wavpack)
+  set_glob(WAVPACK_SRC GLOB ${WAVPACK_SRC_DIR}
+    bits.c
+    float.c
+    metadata.c
+    unpack.c
+    wavpack.h
+    words.c
+    wputils.c
+  )
+  add_library(wavpack EXCLUDE_FROM_ALL OBJECT ${WAVPACK_SRC})
+  set(WAVPACK_DEP $<TARGET_OBJECTS:wavpack>)
+  set(WAVPACK_INCLUDEDIR ${WAVPACK_SRC_DIR})
+  set(WAVPACK_INCLUDE_DIRS ${WAVPACK_INCLUDEDIR})
+
+  list(APPEND TARGETS_DEP wavpack)
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(Wavpack DEFAULT_MSG WAVPACK_INCLUDEDIR)
+  set(WAVPACK_BUNDLED ON)
+endif()
diff --git a/cmake/FindZLIB.cmake b/cmake/FindZLIB.cmake
new file mode 100644
index 000000000..cd49eabf1
--- /dev/null
+++ b/cmake/FindZLIB.cmake
@@ -0,0 +1,55 @@
+if(NOT PREFER_BUNDLED_LIBS)
+  set(CMAKE_MODULE_PATH ${ORIGINAL_CMAKE_MODULE_PATH})
+  find_package(ZLIB)
+  set(CMAKE_MODULE_PATH ${OWN_CMAKE_MODULE_PATH})
+  if(ZLIB_FOUND)
+    set(ZLIB_BUNDLED OFF)
+    set(ZLIB_DEP)
+  endif()
+endif()
+
+if(NOT ZLIB_FOUND)
+  set(ZLIB_FOUND ON)
+  set(ZLIB_BUNDLED ON)
+  set(ZLIB_SRC_DIR src/engine/external/zlib)
+  set_glob(ZLIB_SRC GLOB ${ZLIB_SRC_DIR}
+    adler32.c
+    compress.c
+    crc32.c
+    crc32.h
+    deflate.c
+    deflate.h
+    gzclose.c
+    gzguts.h
+    gzlib.c
+    gzread.c
+    gzwrite.c
+    infback.c
+    inffast.c
+    inffast.h
+    inffixed.h
+    inflate.c
+    inflate.h
+    inftrees.c
+    inftrees.h
+    trees.c
+    trees.h
+    uncompr.c
+    zconf.h
+    zlib.h
+    zutil.c
+    zutil.h
+  )
+  add_library(zlib EXCLUDE_FROM_ALL OBJECT ${ZLIB_SRC})
+  set(ZLIB_INCLUDEDIR ${ZLIB_SRC_DIR})
+  target_include_directories(zlib PRIVATE ${ZLIB_INCLUDEDIR})
+
+  set(ZLIB_DEP $<TARGET_OBJECTS:zlib>)
+  set(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDEDIR})
+  set(ZLIB_LIBRARIES)
+
+  list(APPEND TARGETS_DEP zlib)
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(ZLIB DEFAULT_MSG ZLIB_INCLUDEDIR)
+endif()
diff --git a/src/engine/client/backend_sdl.cpp b/src/engine/client/backend_sdl.cpp
index 4d734e921..40f35e1b0 100644
--- a/src/engine/client/backend_sdl.cpp
+++ b/src/engine/client/backend_sdl.cpp
@@ -6,7 +6,7 @@
 	#define WINVER 0x0501
 #endif
 
-#include "engine/external/glew/GL/glew.h"
+#include <GL/glew.h>
 #include <engine/storage.h>
 
 #include <base/detect.h>
diff --git a/src/engine/client/graphics_threaded.cpp b/src/engine/client/graphics_threaded.cpp
index 4ffd5cfde..1550fe1a1 100644
--- a/src/engine/client/graphics_threaded.cpp
+++ b/src/engine/client/graphics_threaded.cpp
@@ -10,7 +10,8 @@
 #endif
 
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
+
+#include <pnglite.h>
 
 #include <engine/shared/config.h>
 #include <engine/graphics.h>
diff --git a/src/engine/client/opengl_sl.h b/src/engine/client/opengl_sl.h
index 6de06ce1e..4e83073f3 100644
--- a/src/engine/client/opengl_sl.h
+++ b/src/engine/client/opengl_sl.h
@@ -1,6 +1,7 @@
-#pragma once
+#ifndef ENGINE_CLIENT_OPENGL_SL_H
+#define ENGINE_CLIENT_OPENGL_SL_H
 
-#include "engine/external/glew/GL/glew.h"
+#include <GL/glew.h>
 
 class CGLSL {
 public:
@@ -17,3 +18,5 @@ private:
 	int m_Type;
 	bool m_IsLoaded;
 };
+
+#endif // ENGINE_CLIENT_OPENGL_SL_H
diff --git a/src/engine/client/opengl_sl_program.h b/src/engine/client/opengl_sl_program.h
index 3cc04b593..4f4bbda5b 100644
--- a/src/engine/client/opengl_sl_program.h
+++ b/src/engine/client/opengl_sl_program.h
@@ -1,6 +1,7 @@
-#pragma once
+#ifndef ENGINE_CLIENT_OPENGL_SL_PROGRAM_H
+#define ENGINE_CLIENT_OPENGL_SL_PROGRAM_H
 
-#include "engine/external/glew/GL/glew.h"
+#include <GL/glew.h>
 
 class CGLSL;
 
@@ -74,3 +75,5 @@ public:
 	int m_LocDir;
 	int m_LocNum;
 };
+
+#endif // ENGINE_CLIENT_OPENGL_SL_PROGRAM_H
diff --git a/src/engine/client/sound.cpp b/src/engine/client/sound.cpp
index 307d1c46e..d9079806a 100644
--- a/src/engine/client/sound.cpp
+++ b/src/engine/client/sound.cpp
@@ -12,9 +12,10 @@
 
 #include "sound.h"
 
-extern "C" { // wavpack
-	#include <engine/external/wavpack/wavpack.h>
+extern "C"
+{
 	#include <opusfile.h>
+	#include <wavpack.h>
 }
 #include <math.h>
 
@@ -77,9 +78,9 @@ static int m_NextVoice = 0;
 static int *m_pMixBuffer = 0;	// buffer only used by the thread callback function
 static unsigned m_MaxFrames = 0;
 
-static const void *ms_pWVBuffer = 0x0;
-static int ms_WVBufferPosition = 0;
-static int ms_WVBufferSize = 0;
+static const void *s_pWVBuffer = 0x0;
+static int s_WVBufferPosition = 0;
+static int s_WVBufferSize = 0;
 
 const int DefaultDistance = 1500;
 
@@ -414,14 +415,6 @@ void CSound::RateConvert(int SampleID)
 	pSample->m_Rate = m_MixingRate;
 }
 
-int CSound::ReadData(void *pBuffer, int Size)
-{
-	int ChunkSize = min(Size, ms_WVBufferSize - ms_WVBufferPosition);
-	mem_copy(pBuffer, (const char *)ms_pWVBuffer + ms_WVBufferPosition, ChunkSize);
-	ms_WVBufferPosition += ChunkSize;
-	return ChunkSize;
-}
-
 int CSound::DecodeOpus(int SampleID, const void *pData, unsigned DataSize)
 {
 	if(SampleID == -1 || SampleID >= NUM_SAMPLES)
@@ -468,6 +461,46 @@ int CSound::DecodeOpus(int SampleID, const void *pData, unsigned DataSize)
 	return SampleID;
 }
 
+static int ReadDataOld(void *pBuffer, int Size)
+{
+	int ChunkSize = min(Size, s_WVBufferSize - s_WVBufferPosition);
+	mem_copy(pBuffer, (const char *)s_pWVBuffer + s_WVBufferPosition, ChunkSize);
+	s_WVBufferPosition += ChunkSize;
+	return ChunkSize;
+}
+
+#if defined(CONF_WAVPACK_OPEN_FILE_INPUT_EX64)
+static int ReadData(void *pId, void *pBuffer, int Size)
+{
+	(void)pId;
+	return ReadDataOld(pBuffer, Size);
+}
+
+static int ReturnFalse(void *pId)
+{
+	(void)pId;
+	return 0;
+}
+
+static int64_t GetPos(void *pId)
+{
+	(void)pId;
+	return s_WVBufferPosition;
+}
+
+static int64_t GetLength(void *pId)
+{
+	(void)pId;
+	return s_WVBufferSize;
+}
+
+static int PushBackByte(void *pId, int Char)
+{
+	s_WVBufferPosition -= 1;
+	return 0;
+}
+#endif
+
 int CSound::DecodeWV(int SampleID, const void *pData, unsigned DataSize)
 {
 	if(SampleID == -1 || SampleID >= NUM_SAMPLES)
@@ -477,12 +510,22 @@ int CSound::DecodeWV(int SampleID, const void *pData, unsigned DataSize)
 	char aError[100];
 	WavpackContext *pContext;
 
-	ms_pWVBuffer = pData;
-	ms_WVBufferSize = DataSize;
-	ms_WVBufferPosition = 0;
+	s_pWVBuffer = pData;
+	s_WVBufferSize = DataSize;
+	s_WVBufferPosition = 0;
 
-	pContext = WavpackOpenFileInput(ReadData, aError);
-	if (pContext)
+#if defined(CONF_WAVPACK_OPEN_FILE_INPUT_EX64)
+	WavpackStreamReader64 Callback = {0};
+	Callback.can_seek = ReturnFalse;
+	Callback.get_length = GetLength;
+	Callback.get_pos = GetPos;
+	Callback.push_back_byte = PushBackByte;
+	Callback.read_bytes = ::ReadData;
+	pContext = WavpackOpenFileInputEx64(&Callback,0, 0, aError, 0, 0);
+#else
+	pContext = WavpackOpenFileInput(ReadDataOld, aError);
+#endif
+	if(pContext)
 	{
 		int NumSamples = WavpackGetNumSamples(pContext);
 		int BitsPerSample = WavpackGetBitsPerSample(pContext);
@@ -548,32 +591,32 @@ int CSound::LoadOpus(const char *pFilename)
 	if(!m_pStorage)
 		return -1;
 
-	ms_File = m_pStorage->OpenFile(pFilename, IOFLAG_READ, IStorage::TYPE_ALL);
-	if(!ms_File)
+	IOHANDLE File = m_pStorage->OpenFile(pFilename, IOFLAG_READ, IStorage::TYPE_ALL);
+	if(!File)
 	{
 		dbg_msg("sound/opus", "failed to open file. filename='%s'", pFilename);
 		return -1;
 	}
 
 	int SampleID = AllocID();
-	int DataSize = io_length(ms_File);
+	int DataSize = io_length(File);
 	if(SampleID < 0 || DataSize <= 0)
 	{
-		io_close(ms_File);
-		ms_File = NULL;
+		io_close(File);
+		File = NULL;
 		dbg_msg("sound/opus", "failed to open file. filename='%s'", pFilename);
 		return -1;
 	}
 
 	// read the whole file into memory
 	char *pData = new char[DataSize];
-	io_read(ms_File, pData, DataSize);
+	io_read(File, pData, DataSize);
 
 	SampleID = DecodeOpus(SampleID, pData, DataSize);
 
 	delete[] pData;
-	io_close(ms_File);
-	ms_File = NULL;
+	io_close(File);
+	File = NULL;
 
 	if(g_Config.m_Debug)
 		dbg_msg("sound/opus", "loaded %s", pFilename);
@@ -598,32 +641,32 @@ int CSound::LoadWV(const char *pFilename)
 	if(!m_pStorage)
 		return -1;
 
-	ms_File = m_pStorage->OpenFile(pFilename, IOFLAG_READ, IStorage::TYPE_ALL);
-	if(!ms_File)
+	IOHANDLE File = m_pStorage->OpenFile(pFilename, IOFLAG_READ, IStorage::TYPE_ALL);
+	if(!File)
 	{
 		dbg_msg("sound/wv", "failed to open file. filename='%s'", pFilename);
 		return -1;
 	}
 
 	int SampleID = AllocID();
-	int DataSize = io_length(ms_File);
+	int DataSize = io_length(File);
 	if(SampleID < 0 || DataSize <= 0)
 	{
-		io_close(ms_File);
-		ms_File = NULL;
+		io_close(File);
+		File = NULL;
 		dbg_msg("sound/wv", "failed to open file. filename='%s'", pFilename);
 		return -1;
 	}
 
 	// read the whole file into memory
 	char *pData = new char[DataSize];
-	io_read(ms_File, pData, DataSize);
+	io_read(File, pData, DataSize);
 
 	SampleID = DecodeWV(SampleID, pData, DataSize);
 
 	delete[] pData;
-	io_close(ms_File);
-	ms_File = NULL;
+	io_close(File);
+	File = NULL;
 
 	if(g_Config.m_Debug)
 		dbg_msg("sound/wv", "loaded %s", pFilename);
@@ -930,6 +973,4 @@ void CSound::StopVoice(CVoiceHandle Voice)
 }
 
 
-IOHANDLE CSound::ms_File = 0;
-
 IEngineSound *CreateEngineSound() { return new CSound; }
diff --git a/src/engine/client/sound.h b/src/engine/client/sound.h
index 8621b9c87..dfc59d5c9 100644
--- a/src/engine/client/sound.h
+++ b/src/engine/client/sound.h
@@ -25,8 +25,6 @@ public:
 	static void RateConvert(int SampleID);
 
 	// TODO: Refactor: clean this mess up
-	static IOHANDLE ms_File;
-	static int ReadData(void *pBuffer, int Size);
 	static int DecodeWV(int SampleID, const void *pData, unsigned DataSize);
 	static int DecodeOpus(int SampleID, const void *pData, unsigned DataSize);
 
diff --git a/src/game/gamecore.cpp b/src/game/gamecore.cpp
index 12ef3c73e..81745be1e 100644
--- a/src/game/gamecore.cpp
+++ b/src/game/gamecore.cpp
@@ -3,7 +3,7 @@
 #include "gamecore.h"
 
 #include <engine/shared/config.h>
-#include <engine/server/server.h>
+
 const char *CTuningParams::ms_apNames[] =
 {
 	#define MACRO_TUNING_PARAM(Name,ScriptName,Value,Description) #ScriptName,
diff --git a/src/game/version.h b/src/game/version.h
index c870e6739..e2e134cdc 100644
--- a/src/game/version.h
+++ b/src/game/version.h
@@ -2,7 +2,7 @@
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #ifndef GAME_VERSION_H
 #define GAME_VERSION_H
-#include "generated/nethash.cpp"
+#include <game/generated/nethash.cpp>
 #define GAME_VERSION "0.6.4, 11.0.3"
 #define GAME_NETVERSION "0.6 626fce9a778df4d4"
 #define GAME_RELEASE_VERSION "11.0.3"
diff --git a/src/tools/dilate.cpp b/src/tools/dilate.cpp
index 17de1e37e..e5e848e5d 100644
--- a/src/tools/dilate.cpp
+++ b/src/tools/dilate.cpp
@@ -2,7 +2,7 @@
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #include <base/system.h>
 #include <base/math.h>
-#include <engine/external/pnglite/pnglite.h>
+#include <pnglite.h>
 
 typedef struct
 {
diff --git a/src/tools/map_diff.cpp b/src/tools/map_diff.cpp
index 89f073edb..79abfe514 100644
--- a/src/tools/map_diff.cpp
+++ b/src/tools/map_diff.cpp
@@ -1,10 +1,11 @@
 #include <game/mapitems.h>
 #include <game/gamecore.h>
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
 #include <engine/shared/datafile.h>
 #include <engine/storage.h>
 
+#include <pnglite.h>
+
 bool Process(IStorage *pStorage, char **pMapNames)
 {
 	CDataFileReader Maps[2];
diff --git a/src/tools/map_extract.cpp b/src/tools/map_extract.cpp
index e9fe815ef..1ef11d228 100644
--- a/src/tools/map_extract.cpp
+++ b/src/tools/map_extract.cpp
@@ -1,10 +1,11 @@
 // Adapted from TWMapImagesRecovery by Tardo: https://github.com/Tardo/TWMapImagesRecovery
 #include <game/mapitems.h>
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
 #include <engine/shared/datafile.h>
 #include <engine/storage.h>
 
+#include <pnglite.h>
+
 bool Process(IStorage *pStorage, const char *pMapName, const char *pPathSave)
 {
 	CDataFileReader Map;
diff --git a/src/tools/map_replace_image.cpp b/src/tools/map_replace_image.cpp
index fe627f072..2b5f4a170 100644
--- a/src/tools/map_replace_image.cpp
+++ b/src/tools/map_replace_image.cpp
@@ -5,10 +5,10 @@
 #include <base/math.h>
 #include <engine/shared/datafile.h>
 #include <engine/storage.h>
-#include <engine/external/pnglite/pnglite.h>
 #include <engine/graphics.h>
 #include <game/mapitems.h>
 
+#include <pnglite.h>
 /*
 	Usage: map_replace_image <source map filepath> <dest map filepath> <current image name> <new image filepath>
 	Notes: map filepath must be relative to user default teeworlds folder
diff --git a/src/tools/tileset_borderadd.cpp b/src/tools/tileset_borderadd.cpp
index 8c0bccc0d..8f786ed51 100644
--- a/src/tools/tileset_borderadd.cpp
+++ b/src/tools/tileset_borderadd.cpp
@@ -2,7 +2,8 @@
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #include <base/math.h>
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
+
+#include <pnglite.h>
 
 typedef struct
 {
diff --git a/src/tools/tileset_borderfix.cpp b/src/tools/tileset_borderfix.cpp
index 3b1fc4e85..59f069878 100644
--- a/src/tools/tileset_borderfix.cpp
+++ b/src/tools/tileset_borderfix.cpp
@@ -1,7 +1,8 @@
 /* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
+
+#include <pnglite.h>
 
 typedef struct
 {
diff --git a/src/tools/tileset_borderrem.cpp b/src/tools/tileset_borderrem.cpp
index 59cd17a66..d87a8d1f3 100644
--- a/src/tools/tileset_borderrem.cpp
+++ b/src/tools/tileset_borderrem.cpp
@@ -2,7 +2,8 @@
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #include <base/math.h>
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
+
+#include <pnglite.h>
 
 typedef struct
 {
diff --git a/src/tools/tileset_borderset.cpp b/src/tools/tileset_borderset.cpp
index 97d837601..dcd750790 100644
--- a/src/tools/tileset_borderset.cpp
+++ b/src/tools/tileset_borderset.cpp
@@ -2,7 +2,8 @@
 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
 #include <base/math.h>
 #include <base/system.h>
-#include <engine/external/pnglite/pnglite.h>
+
+#include <pnglite.h>
 
 typedef struct
 {