Intellivision Test Cartridge And Baseball (1978) (Mattel).int ROM Download for Intellivision (). Intellivision Test Cartridge And Baseball (1978) (Mattel).int game is available to play online and download only on Late Games. Intellivision Test Cartridge And Baseball (1978) (Mattel).int ROM for Intellivision download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.