Modem Chess (1993)(Bonafide Software) ROM for ColecoVision ADAM (). Modem Chess (1993)(Bonafide Software) game is available to play online and only onRoms Games. Modem Chess (1993)(Bonafide Software) ROM for ColecoVision ADAM requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.