In 2008 I bought:

PC: NHL 2008, Call of Duty 4, C&C3 Kane's Wrath

PS2: Shadow of the Colossus, Metal Gear Solid Essential Collection

PS3: LittleBigPlanet, Metal Gear Solid 4, Resistance 2, Socom Confrontation, Rainbow Six Vegas 2

Xbox 360: Dirt, Forza 2, Gears of War 2, Grand Theft Auto IV, Rock Band, Rock Band 2

Total: 16 Games

PC: Gish, Audiosurf, Hitman Collection (3 games), Shadowgrounds Survivor, COD4, Red Orchestra, Day of Defeat: Source, Peggle Deluxe, Eternity's Child, The Longest Journey, Dreamfall, Super ID Pack (26 games), Fallout 3, Left 4 Dead, Stalker: Shadow of Chernobyl, RACE 07, Half-Life, Blue Shift and Opposing Force, Bejeweled Deluxe, Luxor 2, Rome: Total War. These were Steam games. Now non-Steam: Mass Effect, Spore, Crysis Warhead, Gears of War, Europa Universalis III plus the 2 expansions, Bionic Commando Rearmed. And that's it!

GC: used: Rogue Leader 2, Tales of Symphonia, Four Swords, Wind Waker, Sonic Heroes. New: Killer 7. and I ordered 3 used games last year but I'm still waiting for them haha, F-Zero GX and both Baten Kaitos.

Total: 66, removing ID games it's 40, removing used games it's 32 :P and there were about 5 games that cost me 1 dollar too :P

Steams holiday sale is the only reason I bought over 10 games this year.

14 games on the steam holiday sale (DEC):
Audiosurf
Beyond Good & Evil
Bioshock
Civilisation III: Complete
Company of Heroes
Darwinia
Doom
Doom 2
Flatout
Flatout 2
I-Fluid
Max Payne
Max Payne 2
Runaway, A Road Adventure

2 games on steam:
GTAIV (DEC - Day 1 purchase)
GTA 3 (JUL)

1 PC game:
Full Throttle (FEB)

1 DS game:
The World Ends With You (MAY)

2 PS2 games:
God of War II (NOV)
ICO (FEB)

total: 19 games.
Money spent: €210

The World Ends With You and Grand Theft Auto IV were the only full-priced games I bought this year.

~60 games

I don't even remember what games I bought. haha.
I know with DS, Wii and 360 it was more than 40.

You guys have stunning memories! I'd guess around 40 games including retro platforms but I really don't know what was 2007 and what was 2008.

Completed games underlined...

DS:

Castlevania: Order of Ecclesia
Guitar Hero: On Tour
Sonic Rush Adventure

VC:

Donkey Kong Country 2: Diddy's Kong Quest
Kirby's Adventure
Super Mario Bros. 2: The Lost Levels
Super Metroid

Wii:

Animal Crossing: City Folk WiiSpeak Bundle
Boom Blox
de Blob
Endless Ocean
Guitar Hero: World Tour Complete Band Set
Mario Kart Wii
No More Heroes
Okami
Sonic Unleashed
Star Wars: The Force Unleashed
Super Smash Bros. Brawl
Wario Land: Shake It!
Wii Fit

WiiWare:

LostWinds

Yeah, I've created quite a backlog for myself coming into this new year. It's kind of a bummer too, as there's plenty of games that are coming out that look really fun. Curse you time, you cruel mistress!

In 2008 I bought:

PS3: Rock Band, MotorStorm, The Orange Box, Uncharted: Drake's Fortune, Hot Shots Golf: Out of Bounds, Grand Theft Auto IV, Metal Gear Solid 4: Guns of the Patriots, Dead Space, Rock Band 2, Resistance: Fall of Man, Resistance 2

PSN: PixelJunk Monsters, Super Stardust HD, 1942: Joint Strike, PixelJunk Eden, Bionic Commando, WipEout HD

PSP: Daxter, Crisis Core: Final Fantasy VII, Patapon, God of War: Chains of Olympus, Final Fantasy Tactics: The War of the Lions, LocoRoco


PS3 = 11
PSN = 6
PSP = 6
----------
23 games

For the Wii:

Batman Lego
Mario Kart
Goerge of the Jungle
Rampage Total Destruction
Destroy All Humans

And for the big daddy, Xbox 360:
Quake Wars
Left 4 Dead
Fable 2
Too Human
Gears of War 2
GTA4
Fallout 3
Saints Row 2
Lost Odyssey
Devil May Cry 4
LIPs
Scene it
Also some DLC stuff as well..

Thing is that 2009 has just as many titles I want, which is going to make it hard for me to play all the stuff I want, as much as I want, before I have to start buying again...can we say Halo Wars!?!

Looks like our soon-to-be POTUS owns a Wii. I wonder if Nintendo will tout that in their NPD Press Release about who bought Wiis in December.