Poly-Play

Poly-Play is an East German arcade machine by VEB Polytechnik that came out in 1985. It is the only arcade machine from East Germany. It contains multiple games. One of them is a "Pac-Man" clone. About 2,000 machines were made.
Hardware.
The machine's coin slot works by detecting pressure. It uses 50 Pfennig, but can be tricked by pressing a 1 Pfennig coin the correct way into the top of the slot. This was mostly allowed because the government owned the machines, which were mostly found in FDGB holiday homes, youth hostels and non-profit clubs. The machine could be played for free at many youth clubs until large crowds often came around them.
A machine was shown in the Museum of Computing in Swindon, England in 2004 before being shown as part of the touring video game show Game On from 2005 in multiple museums, such as the Museum of Science and Industry in Chicago and the Science Museum in London. Two machines are at RetroGames e.V. in Germany, and another at the Computerspielemuseum Berlin.
Games.
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.