Armed, also known as Aftermath, is a 2D sidescroller action game developed by Point of View which was intended to be published by Interplay by both the Sega Saturn and PlayStation. A prototype for the Sega Saturn version has been discovered and released, and it's claimed that the game is essentially complete. The same person/group also has some other Sega Saturn prototypes including unreleased games (but released for other platforms) like Bedlam and Heart of Darkness. More details and links regarding the release here: https://assemblergames.com/threads/armed-aftermath-for-the-sega-saturn.67009/
Hmm...In situations like these, Sega Retro usually uploads the proto to it's page (as long as the game was unreleased) to ensure it stays around.