Simon was later re-released by Milton Bradley – now owned by Hasbro – in its original circular form, though with a translucent case rather than plain black. It was also sold as a two-sided Simon Squared version, with the reverse side having eight buttons for head-to-head play, and as a keychain (officially licensed by Fun4All) with simplified gameplay (only having Game 1, Difficulty 4 available). Other variations of the original game, no longer produced, include Pocket Simon and the eight-button Super Simon, both from 1980. Finally, Nelsonic released an official wristwatch version of Simon.
Later versions of the game being sold include a pocket version of the original game in a smaller, yellow, oval-shaped case; Simon Trickster, which plays the original game as well as variations where the colors shift around from button to button (Simon Bounce), where the buttons have no colors at all (Simon Surprise), or where the player must repeat the sequence backwards (Simon Rewind); and a pocket version of Simon Trickster.