Alien Carnage

Originally released as Halloween Harry, is a side-scrolling platform game developed by Interactive Binary Illusions and SubZero Software and distributed by Apogee Software. The game features 256-color VGA graphics and background music in MOD format. Alien Carnage consists of four episodes. The first episode was released as shareware, the remaining episodes were distributed commercially. In May 2007, John Passfield and 3D Realms released Alien Carnage as freeware. In 2014, the game was re-released with Windows support.