Sonic 3 & Knuckles is the best of the Sonics, not Sonic 2 imo (now flame on
). Shame it doesn't work on the GP, as far as I know.
Sonic 1 is not really that good, IMO... it's decent, but it's also tedious at times.
Sonic Pinball is very good, though. Definitely give it a try!
Also,
Phantasy Star 2 is a pretty damn awkward game. The camera lags behind the player so you can't even see where you're going most of the time, AND the dungeons are very confusing. NOT fun. <_<
If you're looking for the hardest game you'll ever play, look no further than
Ecco the Dolphin. Pretty, and insanely hard.
(ARGHH... I cannot jump over the wall...!!)
Super Hang On is a fun motorcycle racing game.
Ren and Stimpy is an amazingly fun platformer, as is
Garfield Caught in the Act. B)
Road Rash is not worth all the hype it received in its time. Get the Game Gear version; it's much better!