CUBE Welcome to the start page for all games based on the cube engines. Back to Wouter's Go download it on the Sauerbraten homepage. Red Eclipse. Files · Forum · Cube homepage · FAQ. cube engine free download. Cube 2: Sauerbraten (game engine & FPS) 3D game engine (more powerful redesign of the Cube engine) and FPS game. Download Cube game & 3D engine for free. 3D game engine and multiplayer/ singleplayer FPS game.