I'm looking for any dump of this game, an early FPS with stage-based structure, basic map design beyond mazes, and unique mechanics like stage destruction (aliens eating trees), a prototype keycard item, and enemy spawning.
The video here shows a few BASIC strings that may mor may not be required to run the game (using j80 or M88). It seems the game came out on tape, but probably had a type-in listing as well (it debuted in the February 1985 issue of ASCII Magazine).
A MAME .xml list has The Alien Island 3D Version listed with a file size, hash, and CRC, which tells me there's some dump out in the wild on disk or tape.