Cartridge only!
Demon Attack is a fixed shooter written by Rob Fulop for the Atari 2600 and published by Imagic in 1982. It was ported to the Intellivision, Odyssey², Atari 8-bit family, VIC-20, Commodore 64, IBM PC, TRS-80, IBM PCjr, and TRS-80 Color Computer. There is also a port for the TI-99/4A titled Super Demon Attack.