What games do you think have the most original concepts, games that you can't really compare to any others.
I think Toejam and Earl on the Sega Megadrive is definately one of the most original. Two aliens who have to collect their ship pieces from Earth, have to find the pieces on the islands while collecting presents which have various things in to help them. When they find each ship piece they use a lift to go up to the next level, but if they fall off an island they end up on the level below again.
Sometimes a phone rings and if you find it it uncovers map pieces. If you get to close to a Hula girl, you start dancing the hula making you vulnerable to enemies, and if you get hit by Cupid's arrow your directions mess up. There's also a Santa which steals your presents and a secret island where you can drink lemonade and relax in a jacuzzi with some girls xD And if you leave the character too long they fall asleep and you have to hit buttons madly to wake them up again.
It rocks and I wouldn't really put it in a class with any other game.