Flight Sim: Not played any, honestly. Might have to Invest In a couple.
First Person Shooter (Singleplayer): Most probaly has to be Half Life, the general series.
First Person Shooter (Multiplayer): Back In the day, I would have to say Americas Army 1/2. Now I would have to say Bad Company 2, Since It makes me keep wanting to play more.
Third Person Shooter: Well. MGS4. (It's supposed to be a "Stealth game", But It failed at it.)
Point-and-click Adventure: Broken Sword. Hands down.
Adventure: Lego Star Wars *Nod* It's accually stupid amounts of Fun, and really amsuing. (But seriously. I dunno what I've played what would class as this..)
Offline RPG: Knights of the old Republic series. (I know this Is supposed to be a "single game" But they both rock so hard.)
Online RPG (MMO): Few Years ago: Silk Road Online Few months ago: WoW. Now: Prob EVE.
Stealth: MGS1. By far.
Beat 'Em Up: Not played many. But one of the original Mortal Kombats. BAck when I accually played 'em.
Puzzler: Portal.
Survival Horror: Mm...Dead Space. But that thing goes on the more "Horror" then "survival", and never managed to complete it. (Yes. I'm a wimp.)
Real Time Strategy (Singleplayer): RTS Single Player? Well. DoW: Winter Assualt, had an awsome storyline. But once they introduced the "Here's a planet. Go take over." style Dark Crusade and Soulstorm has, It got boring.
Real Time Strategy (Multiplayer): Not a fan of Online RTS's, as 99.9% of the time, It's one of 3 things: 1. Spam defenses, survive the rush. 2. Rush asap, and prob get rushed back while your army Is out of the base. 3. Die.
Turn Based Strategy: Blood Bowl, I guess.
Racing: Not a fan of Racing Games. But I 'Spose One of the more "Original" games (When It came out.) like Pod Racer or GTA. When you could customise everything about the car.
Cooperative Multiplayer (any genre): L4D2. Never played L4D1, and not finding Alien Swarm living up to the "Glory" everyone said It was like.
Competitive Multiplayer (any genre): BF 2142. By far. Awsome game. Loved all the squad stuff. Shame It's not there in Bc2 though.
Music / Rhythm: Guitar Hero World Tour.
Sandbox: No game Is "Truely" sandbox. But maybe GTA. When it was young. And fun.
Sports: Blood Bowl. Only sports game I play.
Arcade: Gradius! By Far!
Best game IMO: MGS1. Loved It. I keep wanting to play It. But then relise: I cba with consoles.
PC version pl0z.