Sonic CD

The title screen of the 1993 title Sonic CD, the only Sonic the Hedgehog game released for the SEGA CD add-on for the SEGA Genesis.  Sonic CD, while containing momentum-based gameplay the other Genesis games had, also featured time travel.  It was also the first Sonic game to feature an official Time Attack Mode.  It got a very well done remake in 2011 for Xbox 360, Playstation 3, and Steam, among other platforms.