The original TMNT game was a pain in the ass even with the game genie, never made it past the Mech Turtle level, it think thats what it was. The Top Gun game was impossible to land on the air craft like the review said. The Karate Kid game, I didn't think that it was as difficult as the guy said, the bonuses were pretty cool, chopping blocks of ice. Some other games I had the where difficult were Adventures of Link, I had to have Vivian's parents borrow my cartridge to get me something in the game, then I was able to get to Gannon, but could never beat him. Karnov was a pain in the ass, two hits and you're dead. SNES had some difficult games like Ren and Stimpy, you wouldn't think a kid's game would be that hard, it was so hard, it was just not worth playing. Jurassic Park was tough, and long. There was no way to save that game, and just impossible to collect all the eggs.