I remember being out with friends somewhere when I was 9 or 10, and seeing Space Invaders for the first time. Didn't get to play it as I had no quarters that time...but I was baffled by the graphics that seemingly "floated" in front of the printed backdrop...and the deep, ominous, pulsing BG music as the invaders advanced...
(http://images.webmagic.com/klov.com/images/S/bSpace_Invaders_Deluxe.jpg)
After that I begged my Dad to take me to an arcade, where I first experienced Battlezone! Back then I was actually short enough to use the little step on the front of the cab.... I think I spent all my money just staring through that periscope, blasting wireframe tanks into oblivion, just trying to drive far enough to find out what was up in those mountains! :D
It's funny what an immersive experience that seemed like, given today's photo-real, raytraced, surround sound, force feedback games, but in 1980 it was a friggin blast! ;D
(http://images.webmagic.com/klov.com/images/B/cBattlezone.gif)
Probably my favorite memory was when I was 14 on a youth bus trip. We went to an indoor mini-golf (the only one I've ever seen.) They had an environmental Discs Of Tron there, and I got really good at it! So good, that eventually everyone in the group was standing around me watching and cheering, kinda like that scene in Last Starfighter...heheh! 8)
(http://images.webmagic.com/klov.com/images/D/sDiscs_Of_Tron.jpg)