In addition to the major stuff, many minor things from older Sonic games are featured in Sonic Generations in one way or another. For instance, the elemental shields can be bought in the skill shop, and there are some challenge missions where you have to keep the end-of-level signpost in the air (like everyone tries to do in Sonic 3.) But there's one awesome thing about the Genesis games that Sega hasn't even acknowledged: debug mode. It would have been awesome if this made a cameo in Generations. Perhaps if you pressed Up,Y,Down,Y,Left,Y,Right,Y at the menu that appears when you select a level, and then start it with Act 1 selected, it would do it. Obviously achievements and statistics would be disabled, but it would still be fun. Does anyone else think they missed an opportunity for something awesome?