Win Back was the first game that gave me some epic motion sickness,lol. I loved Mission Impossible 64 and Age of the Empires 2 as a kid, brings back some good child hood memories.

 
   
If I was on my computer as a kid,there was a really good chance I was playing that. 
A few other favorites include,turok 1 and 2,wave race 64,dark forces 2,perfect dark,age of empires 2,outlaws,many others.

 @TheMustacheHero
You Bastard! I forgot about this and now you reminded me.
 Goldeneye 64 is still fun to play with friends. I was on a boredom streak today and I guess what terrible thing I did as a gamer? Today I sat
down and played each cruisin series all the way through. Cruisin' on each setting. Cruisin' USA, Cruisin' World, and Cruisin' Exoctica (Which was a bitch because that games is absolutely terrible...) Like 3 hours.

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Played and enjoyed every one of those games.  Wayne Gretzkey's 3D Hockey will always be one of my favorite games.  Man I love that announcer!

aaahh yes, goldeneye 64. it was my favorite shooter game that i had ever played. i really enjoyed that game i played it for hours. it was  the first game that i found out i could get motion sickness from. 
 
One of my first games that i had ever played was contra for the NES. i really like this game.

Ok first off that comment before me is great. Second, Goldeneye, Pokemon, and Rush were all games that I remember playing and yes they were all great. Man nostalgia FTW.

 WinBack
 

 Win Back is one of those games that I remember sitting on the couch with a group of friends playing for hours.  Looking back I remember this game being amazing since it was the first game of it's kind that I played.  Just the fact that I could take cover and shoot fools around corners blew my mind as a kid, let alone the ending which seemed like the biggest surprise ever, though now it seems pretty lame.
 
 

 Pokemon Blue/Red
 

Any kid growing up when Pokemon first became popular would probably say that Pokemon was one of their favorite games growing up.  I remember the first time I played Pokemon Blue for the first time and thinking that it was the greatest game I had ever played.  It was one of the first games that I sunk a huge amount of time into just collecting Pokemon and trading them with friends then all sharing our stories about what we did in the game the next day at school.
 
 
 
 
 

 GoldenEye

A classic game that was my first exposure to the first person shooter genre.  The game offered a great campaign and some pretty awesome split-screen action.  This was one of the most popular games to play among my friends and I while growing up.  Just the amount of playable characters seemed endless with playable characters such as Bond, Odd Job, Jaws, and even an array of random scientists from the game's single player.

Wayne Gretzky's 3D Hockey

Wayne Gretzky's 3D Hockey became one of my favorite sports games growing up.  My cousin, brother, and I would always play this game and try to get the players to get into a fist fight to see who won.  The game was great in almost every way that an arcade sports game could be, it had some over the top moments like shooting the puck so hard that the goalie went flying or the goalie turning into a brick wall to block a shot.
 
 

Rush 2: Extreme Racing USA
 

Rush 2 was a great racing game that was one of my favorite Nintendo 64 games.  The racing was fast, the cars were awesome, and the tracks seemed extremely detailed.  The stunt level was great for screwing around and the free roaming mode led to a cops and robbers game that my friends and I used to play.

 These are just a few of the games that I enjoyed growing up.  Feel free to post your favorite games from when you were a kid.