Hi imbos! The sourceforge downloads include only the source code and the compiled executables (Win32). In order to run the game you must also have game data files (doom.wad or doom2.wad etc). If you do not own some of the supported games: You can purchase them for a few dollars on Steam You can download and install the shareware game data (http://www.doomworld.com/classicdoom/info/shareware.php) You can download the freeware Chex Quest game (non violent total conversion using the Doom engine) for...