Poly-Play
All games have been able to be played in MAME since 2000. The names of four more games are in the source code: Der Gärtner (The Gardener), Im Gewächshaus (In the Greenhouse), Hagelnde Wolken (Hailing Clouds, a Space Invaders clone) and Der Taucher (The Diver, a game where malicious fish attack a diver). As well as those four games, 'Im Irrgarten (In the Maze), Der Lindwurm (The Lindworm), Fly and AFU are on at least some machines. Another game, UFO, is the original version of Hagelnde Wolken, but was edited because the authorities did not like its fighting themes.