idTech4A++ is idTech game runtime environment for Android. Support DOOM III/Quake 4/Prey(2006)/DOOM3 BFG/Quake 1/Quake 2/Quake 3/Return to Castle Wolfenstein/The Dark Mod/GZDOOM/Wolfenstein: Enemy Territory/RealRTCW/FTEQW/STAR WARS™ Jedi Knight/Serious Sam Classic/Urban Terror/Medal of Honor: Allied Assault/Skin Deep/Quadrilateral Cowboy/Icarus Starship Command Simulator 1. Putting your PC game data(external folder) to launcher setting `Game working directory`(default `/sdcard/diii4a`). 2. Click left icon or right game name text of launcher status bar for choosing game, and select game mod in tab `GENERAL`'s `Game`. 3. Finally `START GAME`. Support DOOM III/Quake 4/Prey(2006) feature: multi-threading renderer pure soft shadow with shadow-mapping wide-character language translation support global illumination rendering translucent/soft stencil shadow Phong/Blinn-phong/PBR/no-lighting rendering Bot mod in DOOM3/Quake 4 View body mod in DOOM3/Quake 4 Full body awareness mod in DOOM3/Quake 4/Prey(2006)