Tetris. No matter how much I played, it just got faster and faster until I died. :( :P

 Really?  I rented Sonic for a week.  I thought for sure the first time you get to the big Genie was difficult until I figured out the secret.  It took about a dozen attempts the second time.  I didn't go on to clear the remaining stuff, didn't have enough time.  Where'd you get stuck?

I can not tell you guys have many countless hours I spent on The very first sonic the hedgehog getting the perfect ending. I hated getting 4 or 5 chaos emeralds and then missing one making my entire trek wasted! I did prevail though, I have gotten so ridiculously good at that game I am tempted to post a youtube video of my time on that game.

Another extremly hard game to beat, Dr. Robotnics Mean Bean Machine. I swear the computer cheats. Beat it, but damn it took a good part of my 11 year old life with it.

It's if you collect sub tanks and know the bosses'  weaknesses. Megaman 2 on NES is much more hard...

Robocop3 ( SNES ) Hard as Hell

Final Fantasy X

I gave up on the game three times! I got 20 hours in, couldn't beat the dragon. Waited a couple of months. Decideded to replay it. Passed the dragon but couldn't beat something else. Quit. Months later, decided to try again. Gave up right on Sin.

This was my first final fantasy game. I never even heard of the final fantasy series until 2004. That's when I finally decided to pick up Final Fantasy X. May pick up XII though.

To me the only challenging Final Fantasy ever was the first one. Dungeons were long and without any saves at all inside. Plus you had to buy your potions one by one!! Now that's hard!

Tetris

Battletoads for NES...BRUTAL!!! Never beat that game. I beat Blaster Master once, but you have to do it in one sitting (5 hours) and I think there are limited continues. Ghouls 'n Ghosts...crazy hard, since you hgave to beat it twice to get the real ending.

i never finished bomberman for the old gb.
The final bos stage 1 was easy 2 was ok, but the 3rd stage i have never bated and tried it loads of time.

and, at this moment i can eat my wall, stones glass window, i cant beat expert on guitar hero.