Medal of Honor: Rising Sun Legend of Zelda: Ocarina of Time, beating it was the greatest achievement of my life so far. And of course any of the Pokemon games.
Both of the N64 Zelda games. BOTH of those games were awesome, OoT was a slightly better game. Majora's Mask was a much greater challenge, I still haven't 100%'ed it to this day. ...God I loved those games...
Pokemon Gold, Jazz Jackrabbit 2, Spyro: The Dragon, Tekken 3, Crash Team Racing and a bunch of other games.
When I turned 7, my parents bought me a PS2, my very first Game Console. One of the first games I got for it was Spongebob Squarepants: Battle for Bikini Bottom. It's still one of my favorite games of all time, but boy is it hard. The last few areas have almost impossible tasks, and the final boss is a pain in the arse. My brother eventually beat him, but then there's one last level, and there's no life pickups, and no checkpoints, so when you die, your dead. Still to this day, I have not beaten it.
Doom I, II, Final, and Majoras Mask, did not spend nearly as much time on Ocarina of Time as I though that MM was a superior game to OOT, but to settle a debate, I have come to the conclusion that OOT and MM are inface the same game, just part 1 and 2. The Legend of Zelda: Ocarina of Time - Majoras Mask.
A lot of games, but the one I remember the most was Sim Copter. Me and my brother would play it together, I would control the keyboard he would control the mouse.
Ah man Warcraft 3 is a great game, amazing campaign and an eternal amount of fun custom games. I still play it.