diff --git a/bin/Resources/exchndl.dll b/bin/Resources/i686/exchndl.dll
similarity index 100%
rename from bin/Resources/exchndl.dll
rename to bin/Resources/i686/exchndl.dll
diff --git a/bin/Resources/fmod.dll b/bin/Resources/i686/fmod.dll
similarity index 100%
rename from bin/Resources/fmod.dll
rename to bin/Resources/i686/fmod.dll
diff --git a/bin/Resources/fmodex.dll b/bin/Resources/i686/fmodex.dll
similarity index 100%
rename from bin/Resources/fmodex.dll
rename to bin/Resources/i686/fmodex.dll
diff --git a/bin/Resources/fmodexL.dll b/bin/Resources/i686/fmodexL.dll
similarity index 100%
rename from bin/Resources/fmodexL.dll
rename to bin/Resources/i686/fmodexL.dll
diff --git a/bin/Resources/libgcc_s_dw2-1.dll b/bin/Resources/i686/libgcc_s_dw2-1.dll
similarity index 100%
rename from bin/Resources/libgcc_s_dw2-1.dll
rename to bin/Resources/i686/libgcc_s_dw2-1.dll
diff --git a/bin/Resources/libgme.dll b/bin/Resources/i686/libgme.dll
similarity index 100%
rename from bin/Resources/libgme.dll
rename to bin/Resources/i686/libgme.dll
diff --git a/bin/Resources/libintl-8.dll b/bin/Resources/i686/libintl-8.dll
similarity index 100%
rename from bin/Resources/libintl-8.dll
rename to bin/Resources/i686/libintl-8.dll
diff --git a/bin/Resources/fmod64.dll b/bin/Resources/x86_64/fmod64.dll
similarity index 100%
rename from bin/Resources/fmod64.dll
rename to bin/Resources/x86_64/fmod64.dll
diff --git a/bin/Resources/fmodex64.dll b/bin/Resources/x86_64/fmodex64.dll
similarity index 100%
rename from bin/Resources/fmodex64.dll
rename to bin/Resources/x86_64/fmodex64.dll
diff --git a/bin/Resources/fmodexL64.dll b/bin/Resources/x86_64/fmodexL64.dll
similarity index 100%
rename from bin/Resources/fmodexL64.dll
rename to bin/Resources/x86_64/fmodexL64.dll
diff --git a/bin/Resources/libgme64.dll b/bin/Resources/x86_64/libgme.dll
similarity index 100%
rename from bin/Resources/libgme64.dll
rename to bin/Resources/x86_64/libgme.dll
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0602de9de..99f2beebe 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -227,6 +227,12 @@ set(SRB2_CONFIG_YASM OFF CACHE BOOL
 set(SRB2_CONFIG_STATIC_OPENGL OFF CACHE BOOL
 	"Use statically linked OpenGL. NOT RECOMMENDED.")
 
+### use internal libraries?
+if(${CMAKE_SYSTEM} MATCHES "Windows") ###set on Windows only
+	set(SRB2_CONFIG_USE_INTERNAL_LIBRARIES OFF CACHE BOOL
+	"Use SRB2's internal copies of required dependencies (SDL2, PNG, zlib, GME).")
+endif()
+
 if(${SRB2_CONFIG_HAVE_BLUA})
 	add_definitions(-DHAVE_BLUA)
 	set(SRB2_LUA_SOURCES
@@ -314,7 +320,17 @@ if(${SRB2_CONFIG_HAVE_BLUA})
 endif()
 
 if(${SRB2_CONFIG_HAVE_GME})
-	find_package(GME)
+	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+		set(GME_FOUND ON)
+		set(GME_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/gme/include)
+        if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(GME_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/gme/win64 -lgme")
+		else() # 32-bit
+			set(GME_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/gme/win32 -lgme")
+		endif()
+	else()
+		find_package(GME)
+	endif()
 	if(${GME_FOUND})
 		set(SRB2_HAVE_GME ON)
 		add_definitions(-DHAVE_LIBGME)
@@ -324,9 +340,20 @@ if(${SRB2_CONFIG_HAVE_GME})
 endif()
 
 if(${SRB2_CONFIG_HAVE_ZLIB})
-	find_package(ZLIB)
+	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+		set(ZLIB_FOUND ON)
+		set(ZLIB_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/zlib)
+		if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(ZLIB_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/zlib/win32 -lz64")
+		else() # 32-bit
+			set(ZLIB_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/zlib/win32 -lz32")
+		endif()
+	else()
+		find_package(ZLIB)
+	endif()
 	if(${ZLIB_FOUND})
 		set(SRB2_HAVE_ZLIB ON)
+		add_definitions(-DHAVE_ZLIB)
 	else()
 		message(WARNING "You have specified that ZLIB is available but it was not found. SRB2 may not compile correctly.")
 	endif()
@@ -334,7 +361,17 @@ endif()
 
 if(${SRB2_CONFIG_HAVE_PNG} AND ${SRB2_CONFIG_HAVE_ZLIB})
 	if (${ZLIB_FOUND})
-		find_package(PNG)
+		if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+			set(PNG_FOUND ON)
+			set(PNG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/libpng-src)
+			if(${SRB2_SYSTEM_BITS} EQUAL 64)
+				set(PNG_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libpng-src/projects -lpng64")
+			else() # 32-bit
+				set(PNG_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libpng-src/projects -lpng32")
+			endif()
+		else()
+			find_package(PNG)
+		endif()
 		if(${PNG_FOUND})
 			set(SRB2_HAVE_PNG ON)
 			add_definitions(-DHAVE_PNG)
diff --git a/src/sdl/CMakeLists.txt b/src/sdl/CMakeLists.txt
index 7f6771262..a3626970e 100644
--- a/src/sdl/CMakeLists.txt
+++ b/src/sdl/CMakeLists.txt
@@ -3,7 +3,18 @@
 set(SRB2_CONFIG_SDL2_USEMIXER ON CACHE BOOL "Use SDL2_mixer or regular sdl sound")
 
 if(${SRB2_CONFIG_SDL2_USEMIXER})
-	find_package(SDL2_mixer)
+	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+		set(SDL2_MIXER_FOUND ON)
+		if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(SDL2_MIXER_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/include/SDL2)
+			set(SDL2_MIXER_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/lib -lSDL2_mixer")
+		else() # 32-bit
+			set(SDL2_MIXER_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/include/SDL2)
+			set(SDL2_MIXER_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/lib -lSDL2_mixer")
+		endif()
+	else()
+		find_package(SDL2_mixer)
+	endif()
 	if(${SDL2_MIXER_FOUND})
 		set(SRB2_HAVE_MIXER ON)
 		set(SRB2_SDL2_SOUNDIMPL mixer_sound.c)
@@ -42,7 +53,18 @@ set(SRB2_SDL2_HEADERS
 source_group("Interface Code" FILES ${SRB2_SDL2_SOURCES} ${SRB2_SDL2_HEADERS})
 
 # Dependency
-find_package(SDL2)
+if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+	set(SDL2_FOUND ON)
+	if(${SRB2_SYSTEM_BITS} EQUAL 64)
+		set(SDL2_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/include/SDL2)
+		set(SDL2_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/lib -lSDL2")
+	else() # 32-bit
+		set(SDL2_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
+		set(SDL2_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2")
+	endif()
+else()
+	find_package(SDL2)
+endif()
 
 if(${SDL2_FOUND})
 	set(SRB2_SDL2_TOTAL_SOURCES
@@ -185,7 +207,18 @@ if(${SDL2_FOUND})
 	endif()
 
 	if(MSVC)
-		find_package(SDL2_MAIN REQUIRED)
+		if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+			set(SDL2_MAIN_FOUND ON)
+			if(${SRB2_SYSTEM_BITS} EQUAL 64)
+				set(SDL2_MAIN_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/include/SDL2)
+				set(SDL2_MAIN_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/lib -lSDL2main")
+			else() # 32-bit
+				set(SDL2_MAIN_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
+				set(SDL2_MAIN_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2main")
+			endif()
+		else()
+			find_package(SDL2_MAIN REQUIRED)
+		endif()
 		target_link_libraries(SRB2SDL2 PRIVATE
 			${SDL2_MAIN_LIBRARIES}
 		)
@@ -241,17 +274,49 @@ if(${SDL2_FOUND})
 	if(${CMAKE_SYSTEM} MATCHES Windows)
 		set(win_extra_dll_list "")
 		macro(getwinlib dllname defaultname)
-			find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}")
-			list(APPEND win_extra_dll_list ${SRB2_SDL2_DLL_${dllname}})
+			if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+				if (${CMAKE_GENERATOR} STREQUAL "MinGW Makefiles")
+					if(${SRB2_SYSTEM_BITS} EQUAL 64)
+						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
+							HINTS ${CMAKE_SOURCE_DIR}/Bin/Resources/x86_64
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/bin
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/bin
+						)
+					else()
+						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
+							HINTS ${CMAKE_SOURCE_DIR}/Bin/Resources/i686
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/bin
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/bin
+						)
+					endif()
+				else()
+					if(${SRB2_SYSTEM_BITS} EQUAL 64)
+						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
+							HINTS ${CMAKE_SOURCE_DIR}/Bin/Resources/x86_64
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/lib/x64
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/lib/x64
+						)
+					else()
+						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
+							HINTS ${CMAKE_SOURCE_DIR}/Bin/Resources/i686
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/lib/x86
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/lib/x86
+						)
+					endif()
+				endif()
+
+				list(APPEND win_extra_dll_list ${SRB2_SDL2_DLL_${dllname}})
+			else()
+				find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}")
+				list(APPEND win_extra_dll_list ${SRB2_SDL2_DLL_${dllname}})
+	endif()
 		endmacro()
 		getwinlib(SDL2 "SDL2.dll")
 		if(${SRB2_CONFIG_SDL2_USEMIXER})
 			getwinlib(SDL2_mixer "SDL2_mixer.dll")
-			getwinlib(libmikmod-2 "libmikmod-2.dll")
 			getwinlib(libogg_0 "libogg-0.dll")
 			getwinlib(libvorbis_0 "libvorbis-0.dll")
 			getwinlib(libvorbisfile_3 "libvorbisfile-3.dll")
-			getwinlib(smpeg2 "smpeg2.dll")
 		endif()
 		if(${SRB2_CONFIG_HAVE_GME})
 			getwinlib(libgme "libgme.dll")