diff --git a/appframework/sdlmgr.cpp b/appframework/sdlmgr.cpp
index 7234f4d1..74566da5 100644
--- a/appframework/sdlmgr.cpp
+++ b/appframework/sdlmgr.cpp
@@ -482,6 +482,14 @@ InitReturnVal_t CSDLMgr::Init()
 
 	fprintf(stderr, "SDL video target is '%s'\n", SDL_GetCurrentVideoDriver());
 	Msg("SDL video target is '%s'\n", SDL_GetCurrentVideoDriver());
+	
+	SDL_version compiled;
+	SDL_version linked;
+
+	SDL_VERSION(&compiled);
+	SDL_GetVersion(&linked);
+
+	Msg("SDL compiled version: %d.%d.%d, linked: %d.%d.%d\n", compiled.major, compiled.minor, compiled.patch, linked.major, linked.minor, linked.patch);
 
 	m_bForbidMouseGrab = true;
 	if ( !CommandLine()->FindParm("-nomousegrab") && CommandLine()->FindParm("-mousegrab") )
diff --git a/common/freetype/config/ftconfig.h b/common/freetype/config/ftconfig.h
index 8d4a074b..5e19c414 100644
--- a/common/freetype/config/ftconfig.h
+++ b/common/freetype/config/ftconfig.h
@@ -1,7 +1,11 @@
 #ifndef __FTCONFIG_H__MULTILIB
 #define __FTCONFIG_H__MULTILIB
 
+#ifdef ANDROID
+#include <sys/cdefs.h>
+#else
 #include <bits/wordsize.h>
+#endif
 
 #if __WORDSIZE == 32
 # include "ftconfig-32.h"
diff --git a/filesystem/basefilesystem.cpp b/filesystem/basefilesystem.cpp
index 4423cb4c..4bd5dfbd 100644
--- a/filesystem/basefilesystem.cpp
+++ b/filesystem/basefilesystem.cpp
@@ -3770,8 +3770,10 @@ bool CBaseFileSystem::IsFileWritable( char const *pFileName, char const *pPathID
 		{
 #ifdef WIN32
 			if( buf.st_mode & _S_IWRITE )
-#elif LINUX
+#elif defined (LINUX) && !defined (ANDROID) 
 			if( buf.st_mode & S_IWRITE )
+#elif ANDROID
+			if( buf.st_mode & S_IWUSR )
 #else
 			if( buf.st_mode & S_IWRITE )
 #endif
@@ -3792,8 +3794,10 @@ bool CBaseFileSystem::IsFileWritable( char const *pFileName, char const *pPathID
 		{
 #ifdef WIN32
 			if ( buf.st_mode & _S_IWRITE )
-#elif LINUX
+#elif defined (LINUX) && !defined (ANDROID) 
 			if ( buf.st_mode & S_IWRITE )
+#elif ANDROID
+			if ( buf.st_mode & S_IWUSR )
 #else
 			if ( buf.st_mode & S_IWRITE )
 #endif
@@ -3812,6 +3816,8 @@ bool CBaseFileSystem::SetFileWritable( char const *pFileName, bool writable, con
 
 #ifdef _WIN32
 	int pmode = writable ? ( _S_IWRITE | _S_IREAD ) : ( _S_IREAD );
+#elif ANDROID
+	int pmode = writable ? ( S_IWUSR | S_IRUSR ) : ( S_IRUSR );
 #else
 	int pmode = writable ? ( S_IWRITE | S_IREAD ) : ( S_IREAD );
 #endif
diff --git a/filesystem/filesystem_stdio.cpp b/filesystem/filesystem_stdio.cpp
index 43916fe3..3bb7c5b5 100644
--- a/filesystem/filesystem_stdio.cpp
+++ b/filesystem/filesystem_stdio.cpp
@@ -972,7 +972,11 @@ void CStdioFile::FS_fclose()
 		AUTO_LOCK( m_MutexLockedFD );
 
 		struct _stat buf;
+#ifdef ANDROID
+		int fd = fileno( m_pFile ); // need to test this
+#else
 		int fd = fileno_unlocked( m_pFile );
+#endif
 		fstat( fd, &buf );
 
 		fflush( m_pFile );
diff --git a/game/client/mumble.cpp b/game/client/mumble.cpp
index 8e58bc22..9d16acc5 100644
--- a/game/client/mumble.cpp
+++ b/game/client/mumble.cpp
@@ -98,6 +98,8 @@ void CMumbleSystem::LevelInitPostEntity()
 		g_hMapObject = NULL;
 		return;
 	}
+#elif defined( ANDROID )
+	return; // TODO: implement
 #elif defined( POSIX )
 	char memname[256];
 	V_sprintf_safe( memname, "/MumbleLink.%d", getuid() );
diff --git a/launcher/launcher.cpp b/launcher/launcher.cpp
index d34ae113..890b76e1 100644
--- a/launcher/launcher.cpp
+++ b/launcher/launcher.cpp
@@ -642,6 +642,8 @@ void ReportDirtyDiskNoMaterialSystem()
 //-----------------------------------------------------------------------------
 bool CSourceAppSystemGroup::Create()
 {
+	Warning( "CSourceAppSystemGroup::Create\n" );
+
 	IFileSystem *pFileSystem = (IFileSystem*)FindSystem( FILESYSTEM_INTERFACE_VERSION );
 	pFileSystem->InstallDirtyDiskReportFunc( ReportDirtyDiskNoMaterialSystem );
 
@@ -674,13 +676,18 @@ bool CSourceAppSystemGroup::Create()
 		{ "", "" }							// Required to terminate the list
 	};
 
+	Warning( "PreAddSystem\n" );
+
 #if defined( USE_SDL )
 	AddSystem( (IAppSystem *)CreateSDLMgr(), SDLMGR_INTERFACE_VERSION );
 #endif
 
+	Warning( "PreAddSystems\n" );
+
 	if ( !AddSystems( appSystems ) ) 
 		return false;
-
+	
+	Warning( "PostAddSystems\n" );
 
 	// This will be NULL for games that don't support VR. That's ok. Just don't load the DLL
 	AppModule_t sourceVRModule = LoadModule( "sourcevr" DLL_EXT_STRING );
@@ -757,6 +764,8 @@ bool CSourceAppSystemGroup::Create()
 
 bool CSourceAppSystemGroup::PreInit()
 {
+	Warning( "CSourceAppSystemGroup::PreInit\n" );
+
 	CreateInterfaceFn factory = GetFactory();
 	ConnectTier1Libraries( &factory, 1 );
 	ConVar_Register( );
@@ -934,7 +943,9 @@ bool GrabSourceMutex()
 	CRC32_ProcessBuffer( &gameCRC, (void *)pchGameParam, Q_strlen( pchGameParam ) );
 	CRC32_Final( &gameCRC );
 
-#ifdef LINUX
+#ifdef ANDROID
+	return true;
+#elif defined (LINUX)
 	/*
 	 * Linux
  	 */
@@ -1166,6 +1177,306 @@ static const char *BuildCommand()
 	return (const char *)build.Base();
 }
 
+#ifdef ANDROID
+#include <android/log.h>
+#include "jni.h"
+
+char dataDir[512];
+
+const char *LauncherArgv[512];
+char javaArgv[2048];
+char gameName[512];
+char startArgs[256][128];
+char language[1024] = "english";
+int iLastArgs = 0;
+static int scr_width,scr_height;
+
+bool bClient_loaded = false;
+bool bShowTouch = true;
+void *libclient;
+
+static struct jnimethods_s
+{
+        jclass actcls;
+        JavaVM *vm;
+        JNIEnv *env;
+        jmethodID enableTextInput;
+} jni;
+
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setMainPackFilePath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setMainPackFilePath" );
+	return setenv( "VALVE_PAK0_PATH", env->GetStringUTFChars(str, NULL), 1 );
+}
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setPatchPackFilePath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setPatchPackFilePath" );
+	return setenv( "VALVE_PAK1_PATH", env->GetStringUTFChars(str, NULL), 1 );
+}
+DLL_EXPORT void Java_com_valvesoftware_ValveActivity2_setCacheDirectoryPath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setCacheDirectoryPath" );
+	//return setenv( "VALVE_CACHE_PATH", env->GetStringUTFChars(str, NULL), 1 );
+}
+DLL_EXPORT void Java_com_valvesoftware_ValveActivity2_gpgsStart()
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_gpgsStart" );
+}
+DLL_EXPORT void Java_com_valvesoftware_ValveActivity2_nativeOnActivityResult()
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_nativeOnActivityResult" );
+}
+
+DLL_EXPORT void Java_com_valvesoftware_ValveActivity2_setNativeLibPath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setNativeLibPath" );
+//	snprintf(dataDir, sizeof dataDir, env->GetStringUTFChars(str, NULL));
+}
+DLL_EXPORT void Java_com_valvesoftware_ValveActivity2_setLanguage(JNIEnv *env, jclass *clazz, jstring str)
+{
+	snprintf(language, sizeof language, "%s", env->GetStringUTFChars(str, NULL));
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setLanguage" );
+}
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setDocumentDirectoryPath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setDocumentDirectoryPath" );
+	setenv( "HOME", env->GetStringUTFChars(str, NULL), 1);
+	return setenv( "VALVE_CACHE_PATH", env->GetStringUTFChars(str, NULL), 1 );
+}
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setDropMip(int a1, int a2, signed int a3)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setDropMip" );
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_saveGame()
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_saveGame" );
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setDataDirectoryPath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity_setDataDirectoryPath" );
+	snprintf(dataDir, sizeof dataDir, env->GetStringUTFChars(str, NULL));
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setExtrasPackFilePath(JNIEnv *env, jclass *clazz, jstring str)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity2_setExtrasPackFilePath" );
+	return setenv( "VALVE_PAK2_PATH", env->GetStringUTFChars(str, NULL), 1 );
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setenv(JNIEnv *jenv, jclass *jclass, jstring env, jstring value, jint over)
+{
+	__android_log_print( ANDROID_LOG_DEBUG, "SourceSDK2013", "Java_com_valvesoftware_ValveActivity2_setenv %s=%s", jenv->GetStringUTFChars(env, NULL),jenv->GetStringUTFChars(value, NULL) );
+	return setenv( jenv->GetStringUTFChars(env, NULL), jenv->GetStringUTFChars(value, NULL), over );
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setGame(JNIEnv *jenv, jclass *jclass, jstring game)
+{
+	snprintf(gameName, sizeof dataDir, "-game %s", jenv->GetStringUTFChars(game, NULL));
+	return setenv( "VALVE_MOD",  jenv->GetStringUTFChars(game, NULL), 1);
+}
+
+typedef void (*t_TouchEvent)(int finger, int x, int y, int act);
+t_TouchEvent TouchEvent;
+
+DLL_EXPORT void clientLoaded( void )
+{
+	bClient_loaded = true;
+	libclient = dlopen("libclient.so",0);
+	TouchEvent = (t_TouchEvent)dlsym(libclient, "TouchEvent");
+	((void (*)(bool, int, int))dlsym(libclient, "showTouch"))(bShowTouch, scr_width, scr_height);
+}
+
+DLL_EXPORT void showKeyboard( int show )
+{
+	jni.env->CallStaticVoidMethod( jni.actcls, jni.enableTextInput, show );
+}
+
+DLL_EXPORT void JNICALL Java_com_valvesoftware_ValveActivity2_showTouch(JNIEnv *env, jobject obj, jboolean show_touch, jint width, jint height)
+{
+	scr_width = width;
+	scr_height = height;
+	bShowTouch = show_touch;
+}
+
+DLL_EXPORT void JNICALL Java_com_valvesoftware_ValveActivity2_TouchEvent(JNIEnv *env, jobject obj, jint fingerid, jint x, jint y, jint action)
+{
+	if( !bClient_loaded )
+		return;
+
+	TouchEvent( fingerid, x, y, action );
+}
+
+DLL_EXPORT const char* getSystemLanguage()
+{
+	return language;
+}
+
+typedef void (*t_SDL_Android_Init)(JNIEnv* env, jclass cls);
+t_SDL_Android_Init SDL_Android_Init;
+
+//typedef void *(*t_SDL_StartTextInput)();
+//t_SDL_StartTextInput SDL_StartTextInput;
+
+typedef void (*t_egl_init)();
+t_egl_init egl_init;
+
+bool bUseGL;
+
+void SetRenderer()
+{
+	if ( bUseGL )
+	{
+		//setenv("USE_BIG_GL", "1", 1);
+	}
+	else
+	{
+		setenv("REGAL_LOG", "0", 1);
+		setenv("REGAL_LOG_ERROR", "0", 1);
+		setenv("REGAL_LOG_WARNING", "0", 1);
+		setenv("REGAL_LOG_INFO", "0", 1);
+		setenv("REGAL_LOG_HTTP", "0", 1);
+		setenv("REGAL_LOG_JSON", "0", 1);
+		setenv("REGAL_LOG_CALLBACK", "0", 1);
+		setenv("REGAL_LOG_ONCE", "0", 1);
+		setenv("REGAL_LOG_POINTERS", "0", 1);
+		setenv("REGAL_LOG_THREAD", "0", 1);
+		setenv("REGAL_LOG_PROCESS", "0", 1);
+		setenv("REGAL_LOG_ALL", "0", 1);
+		setenv("REGAL_DEBUG", "0", 1);
+		setenv("REGAL_ERROR", "0", 1);
+		setenv("REGAL_LOG_FILE", "/dev/null", 1);
+		setenv("REGAL_EMU_SO", "0", 1);
+		setenv("REGAL_THREAD_LOCKING", "0", 1);
+		setenv("REGAL_FORCE_ES2_PROFILE", "1", 1);
+		setenv("REGAL_SYS_GLX", "0", 1);
+		setenv("REGAL_SYS_ES2", "1", 1);
+		setenv("REGAL_SYS_EGL", "1", 1);
+		setenv("REGAL_SYS_GL", "0", 1);
+		setenv("REGAL_GL_VERSION", "2.1", 1);
+		setenv("REGAL_GL_EXTENSIONS", "GL_EXT_framebuffer_object GL_EXT_framebuffer_blit GL_OES_mapbuffer GL_EXT_texture_sRGB_decode GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1", 1);
+	}
+}
+
+void SetArg( const char *arg )
+{
+	char *pch;
+	char str[1024];
+	strncpy( str, arg, sizeof str );
+	pch = strtok (str," ");
+	while (pch != NULL)
+	{
+		strncpy( startArgs[iLastArgs], pch, sizeof startArgs[0] );
+		LauncherArgv[iLastArgs] = startArgs[iLastArgs];
+		iLastArgs++;
+		pch = strtok (NULL, " ");
+	}
+}
+
+DLL_EXPORT int Java_com_valvesoftware_ValveActivity2_setArgs(JNIEnv *env, jclass *clazz, jstring str)
+{
+	snprintf( javaArgv, sizeof javaArgv, env->GetStringUTFChars(str, NULL) );
+}
+
+void SetStartArgs()
+{
+	char lang[2048];
+	snprintf(lang, sizeof lang, "-language %s +cc_lang %s", language, language);
+
+	SetArg(dataDir);
+	SetArg(lang);
+	SetArg(gameName);
+	SetArg(javaArgv);
+	SetArg("-window "
+			"-nosteam "
+			"-nouserclip "
+			"+sv_unlockedchapters 99 "
+			"+mat_queue_mode 2 "
+			"-ignoredxsupportcfg "
+			"-regal "
+			"+gl_rt_forcergba 1 "
+			"+mat_antialias 1 "
+			"-mat_antialias 1 "
+			"+r_flashlightdepthtexture 1 "
+			"+gl_dropmips 1 "
+			"-insecure");
+
+	if( bUseGL )
+		SetArg("-userclip "
+				"-gl_disablesamplerobjects "
+//				"-egl "
+				"+gl_enabletexsubimage 1 "
+				"+gl_blitmode 1 "
+				"+gl_supportMapBuffer 0 "
+				"-gl_separatedepthstencil 0 "
+				"-gl_nodepthtexture 0 "
+				"+r_flashlight_version2 0 "
+				"+gl_emurgba16 0 "
+				"+gl_emunooverwrite 0");
+	else
+		SetArg("-nouserclip "
+				"-gl_disablesamplerobjects "
+				"+gl_enabletexsubimage 0 "
+				"+mat_reducefillrate 1 "
+				"+gl_blitmode 1 "
+				"+gl_supportMapBuffer 1 "
+				"-gl_separatedepthstencil 0 "// default is 1
+				"-gl_nodepthtexture 1 "
+				"+r_flashlight_version2 1 "
+				"+gl_emurgba16 1 "
+				"+gl_emunooverwrite 1");
+}
+
+int LauncherMain( int argc, char **argv );
+
+DLL_EXPORT int SDL_main()
+{
+	// init sdl
+	void *sdlHandle = dlopen("libSDL2.so", 0);
+
+	SDL_Android_Init = (t_SDL_Android_Init)dlsym(sdlHandle, "SDL_Android_Init");
+	SDL_Android_Init(env, cls);
+
+	//SDL_StartTextInput = (t_SDL_StartTextInput)dlsym(sdlHandle, "SDL_StartTextInput");
+	//SDL_StartTextInput();
+
+	chdir(dataDir);
+	getcwd(dataDir, sizeof dataDir);
+	setenv( "VALVE_GAME_PATH", dataDir, 1 );
+	snprintf(dataDir, sizeof dataDir, "%s/hl2_linux", dataDir);
+
+	bUseGL = false;
+
+	SetRenderer();
+	SetStartArgs();
+
+	void *engineHandle = dlopen("libengine.so", 0);
+	void *launcherHandle = dlopen("liblauncher.so", 0);
+	
+#ifdef GL4ES
+
+	void *glHandle = dlopen("libRegal.so", 0);
+	egl_init = (t_egl_init)dlsym(glHandle, "egl_init");
+	if( egl_init )
+		egl_init();
+#endif
+
+	jni.env = env;
+	jni.actcls = env->FindClass("org/libsdl/app/SDLActivity");
+	jni.enableTextInput = env->GetStaticMethodID(jni.actcls, "showKeyboard", "(I)V");
+
+	LauncherMain(iLastArgs, LauncherArgv);
+
+	dlclose(launcherHandle);
+	dlclose(engineHandle);
+
+	return 0;
+}
+
+#endif
+
 //-----------------------------------------------------------------------------
 // Purpose: The real entry point for the application
 // Input  : hInstance - 
@@ -1175,7 +1486,7 @@ static const char *BuildCommand()
 // Output : int APIENTRY
 //-----------------------------------------------------------------------------
 #ifdef WIN32
-extern "C" __declspec(dllexport) int LauncherMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
+extern "C" __declspec(DLL_EXPORT) int LauncherMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
 #else
 DLL_EXPORT int LauncherMain( int argc, char **argv )
 #endif
@@ -1229,7 +1540,7 @@ DLL_EXPORT int LauncherMain( int argc, char **argv )
 	{
 		return -1;
 	}
-
+	
 	const char *filename;
 #ifdef WIN32
 	CommandLine()->CreateCmdLine( IsPC() ? VCRHook_GetCommandLine() : lpCmdLine );
diff --git a/public/filesystem_init.cpp b/public/filesystem_init.cpp
index d6126578..10006487 100644
--- a/public/filesystem_init.cpp
+++ b/public/filesystem_init.cpp
@@ -341,14 +341,20 @@ bool FileSystem_GetExecutableDir( char *exedir, int exeDirLen )
 
 	Q_FixSlashes( exedir );
 
+#ifdef ANDROID
+	const char* libDir = "lib";
+#else
+	const char* libDir = "bin";
+#endif
+
 	// Return the bin directory as the executable dir if it's not in there
 	// because that's really where we're running from...
 	char ext[MAX_PATH];
 	Q_StrRight( exedir, 4, ext, sizeof( ext ) );
-	if ( ext[0] != CORRECT_PATH_SEPARATOR || Q_stricmp( ext+1, "bin" ) != 0 )
+	if ( ext[0] != CORRECT_PATH_SEPARATOR || Q_stricmp( ext+1, libDir ) != 0 )
 	{
 		Q_strncat( exedir, CORRECT_PATH_SEPARATOR_S, exeDirLen, COPY_ALL_CHARACTERS );
-		Q_strncat( exedir, "bin", exeDirLen, COPY_ALL_CHARACTERS );
+		Q_strncat( exedir, libDir, exeDirLen, COPY_ALL_CHARACTERS );
 		Q_FixSlashes( exedir );
 	}
 	
diff --git a/public/tier0/memoverride.cpp b/public/tier0/memoverride.cpp
index 925f9d2a..c0f8e2af 100644
--- a/public/tier0/memoverride.cpp
+++ b/public/tier0/memoverride.cpp
@@ -392,6 +392,8 @@ extern "C"
 #ifndef NO_MEMOVERRIDE_NEW_DELETE
 #ifdef OSX
 void *__cdecl operator new( size_t nSize ) throw (std::bad_alloc)
+#elif ANDROID
+void *__cdecl operator new( size_t nSize ) throw (std::bad_alloc)
 #else
 void *__cdecl operator new( size_t nSize )
 #endif
@@ -406,6 +408,8 @@ void *__cdecl operator new( size_t nSize, int nBlockUse, const char *pFileName,
 
 #ifdef OSX
 void __cdecl operator delete( void *pMem ) throw()
+#elif ANDROID
+void __cdecl operator delete( void *pMem ) throw()
 #else
 void __cdecl operator delete( void *pMem )
 #endif
@@ -415,6 +419,8 @@ void __cdecl operator delete( void *pMem )
 
 #ifdef OSX
 void operator delete(void*pMem, std::size_t)
+#elif ANDROID
+void operator delete(void*pMem, std::size_t)
 #else
 void operator delete(void*pMem, std::size_t) throw()
 #endif
@@ -424,6 +430,8 @@ void operator delete(void*pMem, std::size_t) throw()
 
 #ifdef OSX
 void *__cdecl operator new[]( size_t nSize ) throw (std::bad_alloc)
+#elif ANDROID
+void *__cdecl operator new[]( size_t nSize ) throw (std::bad_alloc)
 #else
 void *__cdecl operator new[]( size_t nSize )
 #endif
@@ -438,6 +446,8 @@ void *__cdecl operator new[] ( size_t nSize, int nBlockUse, const char *pFileNam
 
 #ifdef OSX
 void __cdecl operator delete[]( void *pMem ) throw()
+#elif ANDROID
+void __cdecl operator delete[]( void *pMem ) throw()
 #else
 void __cdecl operator delete[]( void *pMem )
 #endif
diff --git a/scripts/waifulib/compiler_optimizations.pyc b/scripts/waifulib/compiler_optimizations.pyc
new file mode 100644
index 00000000..a672032d
Binary files /dev/null and b/scripts/waifulib/compiler_optimizations.pyc differ
diff --git a/scripts/waifulib/fwgslib.pyc b/scripts/waifulib/fwgslib.pyc
new file mode 100644
index 00000000..3da98ee6
Binary files /dev/null and b/scripts/waifulib/fwgslib.pyc differ
diff --git a/scripts/waifulib/xcompile.pyc b/scripts/waifulib/xcompile.pyc
new file mode 100644
index 00000000..e722183d
Binary files /dev/null and b/scripts/waifulib/xcompile.pyc differ
diff --git a/tier0/assert_dialog.cpp b/tier0/assert_dialog.cpp
index e13b47e0..419d2a6d 100644
--- a/tier0/assert_dialog.cpp
+++ b/tier0/assert_dialog.cpp
@@ -23,7 +23,7 @@
 #include <dlfcn.h>
 #endif
 
-#if defined( USE_SDL )
+#if defined( LINUX ) || defined( USE_SDL )
 
 // We lazily load the SDL shared object, and only reference functions if it's
 // available, so this can be included on the dedicated server too.
diff --git a/tier0/dbg.cpp b/tier0/dbg.cpp
index ce01801f..9bbe1348 100644
--- a/tier0/dbg.cpp
+++ b/tier0/dbg.cpp
@@ -31,6 +31,10 @@
 #include "xbox/xbox_console.h"
 #endif
 
+#ifdef ANDROID
+#include <android/log.h>
+#endif
+
 #include "tier0/etwprof.h"
 
 #ifndef STEAM
@@ -313,6 +317,10 @@ static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, i
 	ret = s_SpewOutputFunc( spewType, pTempBuffer );
 	g_pSpewInfo = (int)NULL;
 
+#ifdef ANDROID
+    __android_log_print( ANDROID_LOG_INFO, "SRCENGINE", "%s", pTempBuffer );
+#endif
+
 	switch (ret)
 	{
 // Asserts put the break into the macro so it occurs in the right place
@@ -903,6 +911,10 @@ void COM_TimestampedLog( char const *fmt, ... )
 	XBX_rTimeStampLog( curStamp, string );
 #endif
 
+#ifdef ANDROID
+	__android_log_print( ANDROID_LOG_INFO, "SRCENGINE", "%s", string );
+#endif
+
 	if ( IsPC() )
 	{
 		// If ETW profiling is enabled then do it only.
diff --git a/tier0/platform_posix.cpp b/tier0/platform_posix.cpp
index ba2783a5..9a12bc3b 100644
--- a/tier0/platform_posix.cpp
+++ b/tier0/platform_posix.cpp
@@ -28,6 +28,9 @@
 #include <time.h>
 #include <fcntl.h>
 #endif
+#ifdef ANDROID
+#include <linux/stat.h>
+#endif
 
 #include "tier0/memdbgon.h"
 // Benchmark mode uses this heavy-handed method 
diff --git a/tier0/threadtools.cpp b/tier0/threadtools.cpp
index caafef6c..99da9d66 100644
--- a/tier0/threadtools.cpp
+++ b/tier0/threadtools.cpp
@@ -23,8 +23,13 @@
 #elif defined(POSIX)
 
 #if !defined(OSX)
+#if defined(ANDROID)
+	#include <fcntl.h>
+	#include <unistd.h>
+#else
 	#include <sys/fcntl.h>
 	#include <sys/unistd.h>
+#endif
 	#define sem_unlink( arg )
 	#define OS_TO_PTHREAD(x) (x)
 #else
diff --git a/tier1/interface.cpp b/tier1/interface.cpp
index 3c91cc30..45ba5c90 100644
--- a/tier1/interface.cpp
+++ b/tier1/interface.cpp
@@ -304,15 +304,26 @@ CSysModule *Sys_LoadModule( const char *pModuleName, Sys_Flags flags /* = SYS_NO
 		
 #ifdef POSIX
 		struct stat statBuf;
+#ifdef ANDROID
+		Q_snprintf(szModuleName, sizeof(szModuleName), "lib/lib%s", pModuleName);
+#else
 		Q_snprintf(szModuleName, sizeof(szModuleName), "bin/lib%s", pModuleName);
+#endif
 		bUseLibPrefix |= stat(szModuleName, &statBuf) == 0;
 #endif
 
-		if( bUseLibPrefix )
-			Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/lib%s", szCwd, pModuleName );
-		else
-			Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
+#ifdef ANDROID
+		char* szModulePath = "%s/lib/lib%s";
+		if (!bUseLibPrefix)
+			szModulePath = "%s/lib/%s";
+#else
+		char* szModulePath = "%s/bin/lib%s";
+		if (!bUseLibPrefix)
+			szModulePath = "%s/bin/%s";
+#endif
 
+		Q_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), szModulePath, szCwd, pModuleName );
+		
 		hDLL = Sys_LoadLibrary( szAbsoluteModuleName, flags );
 	}
 
diff --git a/tier1/pathmatch.cpp b/tier1/pathmatch.cpp
index bd8d3cbd..8e439dfe 100644
--- a/tier1/pathmatch.cpp
+++ b/tier1/pathmatch.cpp
@@ -750,7 +750,7 @@ extern "C" {
 
 		return CALL(freopen)( mpath, mode, stream );
 	}
-
+#ifndef ANDROID
 	WRAP(fopen, FILE *, const char *path, const char *mode)
 	{
 		// if mode does not have w, a, or +, it's open for read.
@@ -788,7 +788,7 @@ extern "C" {
 	{
 		return __wrap_open( pathname, O_CREAT|O_WRONLY|O_TRUNC, mode );
 	}
-
+#endif
 	int __wrap_access(const char *pathname, int mode)
 	{
 		return __real_access( CWrap( pathname, false ), mode );
@@ -815,6 +815,7 @@ extern "C" {
 	{
 		return CALL(opendir)( CWrap( name, false ) );
 	}
+#ifndef ANDROID
 
     WRAP(__xstat, int, int __ver, __const char *__filename, struct stat *__stat_buf)
     {
@@ -835,7 +836,7 @@ extern "C" {
     {
         return CALL(__lxstat64)( __ver, CWrap( __filename, false), __stat_buf );
     }
-
+#endif
 	WRAP(chmod, int, const char *path, mode_t mode)
 	{
         return CALL(chmod)( CWrap( path, false), mode );
diff --git a/tier1/strtools.cpp b/tier1/strtools.cpp
index cfef6b13..09a95cba 100644
--- a/tier1/strtools.cpp
+++ b/tier1/strtools.cpp
@@ -47,7 +47,11 @@
 #include <stdarg.h>
 
 #ifdef POSIX
+#ifdef ANDROID
+#include <../thirdparty/libiconv-1.14/include/iconv.h>
+#else
 #include <iconv.h>
+#endif
 #include <ctype.h>
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/togl/linuxwin/glentrypoints.cpp b/togl/linuxwin/glentrypoints.cpp
index 25e49ab3..fad300d7 100644
--- a/togl/linuxwin/glentrypoints.cpp
+++ b/togl/linuxwin/glentrypoints.cpp
@@ -43,7 +43,7 @@
 #include "tier1.h"
 #include "tier2/tier2.h"
 
-#ifdef _LINUX
+#if defined(_LINUX) && !defined(__ANDROID__)
 #include <GL/glx.h>
 #endif
 
@@ -296,7 +296,7 @@ static bool CheckOpenGLExtension_internal(const char *ext, const int coremajor,
 				return false;
 			}
 		}
-#elif !defined ( OSX )
+#elif !defined ( OSX ) && !defined( __ANDROID__ )
 		if (!ptr)
 		{
 			static CDynamicFunctionOpenGL< true, Display *( APIENTRY *)( ), Display* > glXGetCurrentDisplay("glXGetCurrentDisplay");