Batman & Robin is an unreleased game for the Sega Saturn. It was a port of the PlayStation game of the same name, however was cancelled before release, presumably due to negative reception.
A driving/racing game for Sega Saturn developed by CAVE and TBS Television.
It was made as a tie-in to TBS's mid-1990s Japanese game show Tokyo Friend Park, where one of the games, Delisoba ("delivery soba"), had celebrities command a virtual motorcycle trying to deliver soba to the TBS TV Studios. Deluxe is a "port" of this game to the Saturn, which adds features such as a time attack and track editor, and was not sold in stores, but rather given away at the show (either to winners or to audience members, exactly what is unknown).
Alongside the production of Sonic X-treme, STI was working on another game only known as "Sonic Saturn". Rather than use sprites for sonic, though, it was going to use a 3D model for Sonic. This game was meant to have a more realistic rendition of Sonic's world than X-treme. It was never actually announced publicly that it was in production, but didn't get very far before being canceled.
Originally designed for the Sega Genesis, then the 32x, and finally the Saturn, Sonic X-treme was meant to be the first fully realized 3D Sonic title. It was eventually cancelled in 1997 after spending a year in development hell.