I know these have been said but

SNES
Super Mario
Zelda

PC
Deadly Tide
Baldur's Gate

Well I was playing since the Speccy days. The game that made me a retro gamer, as in buying older games than the current generation was probably the Capcom Generations Packs on the Sega Saturn (Commano, MERCS, Gunsmoke highly recommended!), Sega's own Sega Ages pack with Afterburner, Outrun and Space Harrier and Taito's Chase HQ & SCI.

When I was like 3 or 4 my old man came home with an atari and I've been hooked on games ever since. For the Atari I was especially hooked on River Raid. When I got a Laser 128 computer I got hooked on Ultima and the gold box series(pool of radiance, curse of the azure bonds,etc) Since then I have been a hardcore RPG kinda guy.

definitely C64 games, i remember playing Gauntlet and the awesome Bruce Lee game

I had an old tape drive system and lots of games, I forget which one and can't remember details of the games. I also had an Atari XE GS that I got for £10 off a carboot but I never spent much time on it (only game I had that wasn't a basic arcade port was a flight sim with a 200 page manual and I was 8); so the first one I guess would be Sonic the Hedgehog which was built into my master system; that really kindled my love of games ! :)

When I was a very small child, we had an Atari 2600, and I never stopped gaming from there.

There wasn't any specific game, and I will never remember which one did I play first, but I loved Space Invaders, Enduro and Pitfall. I also played River Raid, Frogger (though I swear the version I played used a chicken. Might have been some hack), etc.

After that, I got a Master System 3. And played just it all the way to my first pc, and never bought another console. My family is not rich so we just couldn't. We also couldn't update our pc for years, so once I ran out of games to play on it, I began to go backward in time, and that made me a retro-gamer.

I'm still in college, so I don't have any consoles or a gaming pc, so I will be retro-gaming for a while. And there's so much to play that I won't mind if I can't get one so soon =)

It was either Galaxian or Space Invaders on the Atari 2600 that got me hooked in the late 80's.

Glad to see Wolf3D and NES/SNES games on the list.

Also throw Zork and JumpMan on here for me...

MO5 with Android. Then my brother and I got a Tandy. Does anybody remember that ?

Raid on Fort Knox

Doom was the first game I ever played. Blood is probably the game that cemented my interest in gaming as more than a hobby though.

I believe what first sparked an interest would be Super Mario Allstars + Super Mario World for the SNES. My cousins owned it when I was a kid and going over there to play it was pretty much what I lived for. The first game I remember owning was Super Mario 64. From then on, I was a gamer for life.

UFO on the Odyssey 2 - not a great game (Asteroids clone) but I was just amazed that you could steer an image around on your home television set.

Although I'd played other games before it, it was probably Manic Miner that really got me hooked.

What games didn't make me want to game for life? I mean honestly, since as early as the age of 2, I've been playing games. I've even written many ideas *5 notebooks full to date with a full portfolio of about 30 renderings and hand-drawn scenes* that I want to pitch to companies. The problem is that unless it's absolutely ecastacy-graced mind-blowingly insane, I don't know if I'll have a great chance of getting any made.