Spy's Demise is an action game written by Alan Zeldin for the Apple II and published by Penguin Software in 1982.

Ports of the game had a music loop of renditions of Eastern European classical and folk tunes, including: The puzzle consisted of a nine-line cryptogram, one line of which was displayed after completing the corresponding level.

[5] The 1983 sequel, The Spy Strikes Back,[6] was not written by Zeldin, but Penguin Software founder Mark Pelczarski and Robert Hardy.

Both games, along with Penguin's Thunderbombs, were later released together as Arcade Album #1 for the Apple II, Atari 8-bit, and Commodore 64.

Reviewers for Zzap!64 magazine were extremely critical of the games and awarded the release an overall score of 10%.