X-Men: Mind Games is a cancelled action game that was in development by Scavenger and it would have been published by SEGA in 1995 / 1996 for the 32X. The game was shown at the E3 1995 and a playable demo was found and leaked by the SEGASaturno community in August 2009! This version is playable only trough real hardware (edit: now supported by Kega Fusion) and it’s an early prototype with a couple of levels. A mirror of the leaked beta can be downloaded on Hidden Palace. (edit: not available)
Thanks to Celine for the contribution and props to SEGASaturno!