Galaxian³

Part of the Galaxian series, this is a sequel to Galaxian and Galaga, released in 1990. Running on on multiple Namco System 21 "Polygonizer" arcade boards (anywhere from 2 to 16, depending on version), EGM described Galaxian³ as having the most visually impressive polygonal 3D graphics in any video game released up until 1992. The game was very expensive, with the scaled-down 6-player version (using 2 "Polygonizer" boards) costing $150,000 at the time (equivalent to over $250,000 today).