List of Video game engines Source port · First-person shooter engine (List) · Tile engine · Game engine recreation Free/ open source Aleph One · Allegro library · Arianne · Axiom Engine · Build engine · Box2D · Crystal Space · Cube · Cube 2: Sauerbraten · DarkPlaces · Delta3D · Digital Novel Markup Language · Dim3 · Doom source port · Exult · FTE QuakeWorld · Game Blender · Genesis Device · Gene..