The keyboard is yellowed. Alley Cat, Amazing Maze, Blockout, Boulder Dash, Buck Rogers, Bugs Bunny, Centipete, Dig Dug, Donkey, Dr Rudy, Galaxian, Lode Runner, Mystery Mansion, Ninja, Pacman (4 versions), Paratrooper, Pharaoh's Tomb (4 versions), Sopwith, Space Racer, Starglider, Starquake, Striker, Tetris, Zaxxon.