"I rarely participate in these blogosphere trends (mainly because I tend to come to them too late), but here are the fifteen most meaningful games to me, not necessarily in order. I've provided a little explanation for some of them, as well:"Well I'm a blogwhore and jump on any meme, even ones I read about tangentially and aren't even sure exist ;)
From the Sorcerer's Skull
1. D&D - Blue Box! Norm's first RPG ever, nuff said.
2. Rolemaster - When 2ed and TSR's money grubbing, splatbook whorring ways became apparent to me I fled D&D. And fell into Rolemaster's warm embrace. (the warmth was from the 4/hits round of bleeding I suffered from the Fall/Crush 'C' critical I had received)
3. FUDGE - The messiah that wasn't.
4. ICE MERP - Middle Earth Roleplaying. I had most if not all of the 1st ed supplements. Showed me how bad ass a wilderness map could be. Gave me interest in Flora and Fauna, Herbs and Poison tables. Taught me everything I knew about Middle Earth before the movies came out. And sold along with MTG cards funded a 9mo bike trip around Europe.
5. ToEE PC game (and module, one of my most successful campaigns. Lareth the Beautiful most fab villain ever). The game that brought me back to D&D (3.5).
6. D&D 3.5 - Taught me exactly what I like as a DM and a gamer (it's not 3.5)
7. Arduin - Arrived very late here. The Parlament Funkadelic of RPGs.
8. Go - subtlety, sacrifice, the whole, humility.
9. SPI's War of the Ring - My first (of very many) paper chit and hex wargames. Wow, just realized this is probably the only item I've managed to retain from before age 14, certainly the only game.
10. Star Castle - Arcade video game, the first I ever played.
11. MTG CCG - Learned very much about game mechanics/theory.
12. Settlers of Catan - My first (of very many) modern/adult/euro style board games.
13. Traveller RPG - Space; it's really, really big and still you can't get away from "Hard" Sci-fi dweebs.
14. Labyrinth Lord - The game I most want to play, and by play I mean houserule beyond all recognition.
15. "Basic Computer Games" - Start of my tech career which has given me joy, stress, bad posture, pale skin and best of all; time and the money to play all the games I want.