Zelda II: The Adventure of Link, the first one on NES.
Manic Mansion
California Games
Marble Madness
Klax

Lode Runner on the C64. Plus he had a monitor for his 64 which made it even cooler!
He never wanted to play it though. :/ I bought this, at a game show last year, for the Atari 7800. I still have no idea
what it is. Still haven't tried it out. heh

3 separate friends & 3 games in chronological order:

Star Raiders (Atari)
Legend of Zelda (NES)
Shadow of the Beast (Amiga)

Nothing to the extent of coveting it, but I remember one game I played for hours at a friends' Spectrum, which had racing through trees and trying to avoid them. Probably Deathchase.

Oh it's like that most people owned sonic those days like my cousin and friend and me.
Nowadays some of those games are for pc like sonic mega collection plus or sega mega drive gold collection.You can still try it nowadays if you have a little money and a pc and luck finding one of these 2 game collections.

Friend 1: Megaman 3, Super Mario Bros. 3 (NES)
Friend 2: Mortal Kombat, NHL 95, Wing Commander (SNES)
Friend 3: Leisure Suit Larry (Amiga)
Friend 4: Leisure Suit Larry 6 (PC)
Friend 5: Asterix (SMS)
Friend 6: Police Quest (DOS or Amiga, I've forgotten which one)

I also had one friend who had in his possession the entire NES library (or it seemed like that to us kids, at least). How this was possible in the mid-90's in an economically depressed Finland, I have no idea. Maybe the family had secretly won a lottery and had decided to spend it all on NES cartridges. Sadly, the family moved away when I was in 3rd (I think) grade.

A friend of mine had Marathon and it blew my mind. So I got a PC, eagerly anticipating getting it for myself. And then I cried when the truth hit me.

That was computer retard lesson number 1 for me. I know they ported the Marathon games to PC later, but the point is that while I wanted that game during its first release, the whole cross platform thing went over my head. At that point in time, the only concept of platform distribution I had was that you couldn't stick a SEGA cartridge into a Nintendo.

I had a friend who grew jealous of my rig back in 2007, it wasn't anything special, but his was awful in comparison, so he went out and put down 3 fucking grand on a pre-built. I thought it was the stupidest thing he could do, but I went over to check out some games a few times. One of those games being Crysis. I thought it was pretty cool. Another was World in Conflict, which I thought was awesome, it looked so "real" at the time..

Actually I think it was the other way around most of the time for him, one time I showed him not even 30 minutes of Half-Life, he went out and bought every single one. Then when FEAR came out he came over and saw that, he went home and bought it. Then Battlefield 2 came out, he saw it at my place, went out and bought it. He was a spoiled kid, and I went from poor to barely okay growing up, so maybe $3000 was a mere small dent to him.

A year later we stopped talking completely.

UMS (Universal Military Simulator) on the Amiga
and BladeRunner on the PC

Giving you platypus?

Have you played it?
Back in day I liled this game.
Once I brought a magazine just because it's CD had it's demo.

One neighbor kid had Star Fox and Mario Paint (and a SNES, obviously). Another had a Saturn and an arcade machine that played Asteroids. Yet another kid had one of the Mortal Kombat games. I had NBA Jam for Genesis—boom shakalaka—and would sometimes rent games from the video store and try to beat them with a neighbor even further down the street.

Our weird little network of gamers ensured that no one was left wanting, and everyone's parents were constantly upset about the kids that would randomly barge through the door. Those were good times.