PS3:
Resistance,
Motorstorm,
FEAR (waste of money),
Fight Night (another waste),
Warhawk,
COD4,
Assasins Creed
(will buy another by the end of the year)

PSP

Squad Command
Killzone: Liberation
Worms
SSX on tour
SOCOM
GRAW

Ouch... that's far more than i thought...

How many games? Too many.... Let's see

About 10 PC games for my new laptop, all from the bargain bin (except Fable). All goods ones though, all 3 Prince of Persias for example.

Wii: 5 Tiger Woods, Mercury Meltdown, RE4 and Mario & Sonic, RRR

Now add in my teenaged sons

PC: 2

DS: 5 (Diddy Kong racing, Create & Race, Zelda:PH, Star Wars, some music game)

Wii: 5 - Lego Star Wars, MoH:Heroes 2, SGM, Mario Strikers Charged, Godfather

DS:
Ouendan 2
Taiko no Tatsujin
Nodame Cantabile
Elite Beat Agents
Jam Sessions
New York Times Crossword Puzzle
Puzzle Quest
Chessmaster
Panzer Tactics
Brain Age 2
Phoenix Wright
Pokemon
Zelda
Contra
More that I can't remember

PSP:
Jeanne D'Arc
Monster Hunter 2
Hot Shots Golf
Crush
Field Commander
Parappa

Wii:
Zelda
Resident Evil
Metroid
Guitar Hero
Mario

29 Games

Xbox 360: Halo 3, Mass Effect, BioShock, Guitar Hero 2 & 3, Crackdown, Forza Mortorsport 2, Naruto: Rise Of A Ninja, The Darkness, Dead Rising, Lost Planet.

PS3:Warhawk, MotorStorm.

PS2: God Of War 1 & 2.

Wii: Resident Evil 4 Wii Edition, Super Paper Mario, Warioware Smooth Moves, Metroid Prime 3, Mario Party 8.

DS: Megaman Star Force, Final Fantasy III, Mario Kart DS, New Super Mario Brothers, Metroid Prime Hunters, Pokemon Pearl.

PSP: None

I still have to buy Super Mario Galaxy, Resident Evil Umbrella Chronicles, Rock Band, Call Of Duty 4, The Orange Box, Uncharted Drakes Fortune, Heavenly Sword, Racket And Clank Future Tools Of Destruction and The Legend Of Zelda Phantom Hourglass this year.

Wii:2 games
Wii play
Wario Ware (returned because it sucked!)

PC: surprisingly nothing

Bought a 360: 3 games + 2 given as presents
Halo 3
Top Spin 2(scratched don't play it)
Assassins Creed
CoD4 (Gift)
Crackdown(gift)

PS2: 1 game

Bully

GC: 1 game (played on my wii)

Gun 

Will probably buy:
Mario Galaxy
Nights
Mass Effect
Fire Emblem (if i get bored and want to waste money)

I got a 360 in January. Now I own:
Mass Effect
Assassin's Creed
Call of Duty 4
Halo 3
Bioshock
Dead Rising
Rumble Roses XX
Top Spin 2
Tetris Evoloution
WWE 2007
Bullet Witch (which is actually pretty fun)
Graw
Graw 2
Kameo
Tomb Raider Legend
Tomb Raider Anniversary
Lost Planet
Table Tennis
Saints Row
Burnout Revenge
Gears of War
COD2
way too many XBLA games.

I got my Wii in june. Since then, I've bought:
Wii Sports (of course)
Wii Play
Red Steel
Resident Evil 4
Metroid Prime 3
Wario Ware 5
Super Mario Galaxy
Carnival Games
Way too many VC games

I still support my PS2, and I bought a ton of original XBOX games (didn't have one last generation), and a couple Gamecube games. My DS library is pretty healthy too. I work 2 jobs, so some of these games have yet to be touched. There are a couple games like Project 8 that I've traded in. I hate to think how much money I've spent this year.......and there are still a few games I lust for this holiday season!

I have Raving Rabbids for the Wii, and Fight Night for the 360 too. Those are loaned out.

PSP: Monster Hunter Freedom 2,
WWE Smackdown! vs. RAW 2008
Manhunt 2
FFT: War of the Lions
Silent Hill Origins
Syphon Filter: Logan's Shadow
Castlevania: Dracula X Chronicles
Star Wars Battlefront: Renegade Squadron

360: Naruto
Assasin's Creed
ME
Rock band
GHIII
Oblivion
Moto GP 08
FM2
Marvel: Ultimate Alliance
many more

If I count them all, I'll probably start crying. And then my wife will shoot me for spending too much.

Probably around 25 games this year, maybe even more if I think about handheld games.

-Dreamcast

Under Defeat
Psyvariar 2: The Will To Fabricate
Zero Gunner 2
Border Down
TriZeal

-PS1

Mega Man Legends
Pocket Fighter

-PS2

God Of War 2
Raiden III


-DS

Kirby Canvas Curse
New Super Mario Bros.

-PSP

Star Soldier
Mercury Meltdown
Twinbee Portable

Still to buy this year: Konductra, Kirby Squeak Squad, Lumines Plus, Bubble Bobble Evolution, Crush.

You bought SPIDERMAN 3? I've lost ALL* respect for you, leo-j.

* Nearly non-existant :P