Doom - When i finally knew how to beat the Cyberdemon...

Doom 2 - Beating "The Icon of Sin" without cheats, and later redoing the level using IDCLIP only to find out the real secret of the boss....

Command & Conquer : The first time i used the Ion Cannon and the Nukes...

Half-Life: The Resonance Cascade

Portal: Solving the puzzles or screwing up on purpose, or not, you know what? the whole game...

First time i played Diablo 1, 2, Starcraft, Dune2, Duke Nukem 3D, Quake, Age of Empires, Fallout 1, 2, 3, The Elder Scrolls 1,2,3,4

Killing Mario with a shotgun in a quake2 mod

The elastic floor room in Serious Sam:the second encounter.
That game had some of the most original level designs ive ever seen in an FPS

Eve online. A one thousand man pvp hellfest that lasted for hours. F-T battle that was.

Completing my first successful roller coaster design on Roller Coaster Tycoon (one of my most played games).

Completing an epic log flume with kick ass scenery in Roller Coaster Tycoon 2 (also one of my most played games).

Finishing all missions in Commandos:Behind Enemy Lines & Beyond The Call of Duty without losing a single commando. Both were truly great games.

My all-time fave would be a whole host of moments from Master of Olympus Zeus. Such as finishing the final adventure, attracting a hero to my city for the first time, first time I conquered a rival, first hoplites, building Zeus's Temple and probably a couple more I'm forgetting. Master of Olympus Zeus is my fave PC game and the game I have the most memories for. It was just so well-made.

The first time I could go on one of my rides on Theme Park the first. It looked so cool in 3D. Or playing Magic Carpet, I loved that game. Although back then, the brown caterpillars scared be D=

Oh and playing Terminal Velocity on the new comp, and flying over the cloud line for the first time

when playing a clan war in Tactical Ops (FPS), I was hiding behind a column waiting for the round to finish. the guy came in the room and just when he was going to find me, I walked around the column and the time was up. everyone was laughing in teamspeak. the most awesome part is that I DIDN'T know the exact time to walk around. I just did it when it felt right.. and it worked.

When Diablo 3 was announced.

June 28th, 2008. I remember I was watching Blizzard's live stream of their WorldWide Invitation event at 6 in the morning.. June 28th.. The best day in PC gaming history.

the old counterstrike days...when there was such a team called CK3...for most you that dont know..it's the old old clan that KSharp used to be...u can say it's the original name for team 3d....

Many insane moments in utk4 online, so many assaults being won with less than a second left etc etc