Asterock is a copy of Atari's Asteroids. The italian company Sidam manufactured/developed an own CPU PCB for their upright cab while still using many parts of the original Asteroids code. The cabinet was also different in some aspects. Although the color scheme was very similar to Asteroids and the bezel around the monitor was black, the game had a completely different control panel layout and -graphics. The sideart is also completely different. Sidam used the Electrohome G05-802, 19 inch XY b/w monitor.