Nintendo 64: 10.

Dont recall all of em but here are a few:

-Super mario 64 / Nintendo.

-James bond: Goldeneye / Rare.

-The legend of zelda: Ocarina of time / Nintendo.

-Gauntlet legends / Midway.

-Excitebike 64 / Nintendo.

-Pokemon stadium / Nintendo.

-Pokemon snap / Nintendo.

-Turok: Rage wars / Acclaim.

Nintendo Gamecube: 26.

-Zelda: The windwaker / Nintendo.

-Super mario sunshine / Nintendo.

-Timesplitters 2 / Free radical.

-Timesplitters: Future perfect / Free radical.

-Beyond good & evil / Ubisoft.

-Splinter cell 1 / Ubisoft.

-Splinter cell 2 / Ubisoft.

-Splinter cell 3 / Ubisoft.

-Medal of honor: European assault / EA.

-Ghost recon / Ubisoft.

-Paper mario 2: The thousand year door / Nintendo.

-Second sight / Free radical.

-Star wars roque squadron III: Rogue leader / Factor 5.

-Mario kart: Double dash / Nintendo.

-Tony hawks underground 2 / Activision.

-Tony hawks pro skater 4 / Activision.

-Harry potter 2: And the chamber of secrets / EA.

-Spiderman 2 / Activision.

-Animal crossing / Nintendo.

-The lord of the rings: The return of the king / EA.

-Fifa 2004 / EA.

-Fifa 2006 / EA.

-James bond: Nightfire / EA.

-James bond: Everything or nothing / EA.

-James bond: Goldeneye rogue agent / EA.

-James bond: From russia with love / EA.

Nintendo Wii. 4:

-The legend of Zelda: Twilight princess / Nintendo.

-Wii sports / Nintendo.

-Warioware: Smooth moves / Nintendo.

-The godfather: Blackhand edition / EA.

 Virtual console:

-Donkey kong country / Nintendo.

-Street fighter II / ???.

-The legend of Zelda: A link to the past / Nintendo.

-Lylat wars / Nintendo.

Gameboy/color/gba etc...:

About 20... I don't remember most of em but the best were:

-Mario vs Donkey kong / Nintendo.

-Tetris / Nintendo.

-Pokémon red / Nintendo.

-Pokémon blue / Nintendo.

-Pokémon yellow / Nintendo.

-Pokémon gold / Nintendo.

Nintendo DS. 6:

-Super mario 64 DS / Nintendo.

-Nintendogs / Nintendo.

-Brain training: How old is your brain / Nintendo.

-Metroid prime hunters / Nintendo.

-Warioware: Touched / Nintendo.

-New super mario bros / Nintendo.

Only games that i still have, and most are bought cheap (on sale or 2. hand).
Xbox: 14
Xbox 360: 10
360 Arcade: 7 + 4 free (Hexic, Uno, Totem & Texas Hold'em)

Gamecube : 25
Wii : 4 (also 7 virtual console)
Playstation 2 : 40+

My boxed console games for my PS3 and Nintendo DS currently:

PS3)

1 Resistance Fall of Man

2) Oblivion

3) Motorstorm

4) Ape Escape 2 (PS2 game, Never owned a PS2 though as I skipped last gen)

5) God of War (PS2 game)

6) Jak 3 (PS2 game)

NDS)

1) Super Mario Bros

2) Mario Kart

3) Meteos

4) Castlevania Portrait of Ruin

The N64 is the only console that I still own since I bought it, and I still own 11 games on it (and plane to buy others..).
On the GC, I must have something like 7-8 games.
The DC has more than 20, I'll try to figure out exactly how many later...

Wii: 4
Wii Sports
Zelda
Dragon Ball Z: Budokai Tenkaichi 2
Super paper mario

VC: 3
Super Mario Bros.
Beyond Oasis
Kirby's Adventure

Gamecube: 20+

DS: 6
Super Mario 64 DS
Feel the Magic
Nintendogs
Kirby Canvus Curse
Animal Crossing
Mario Kart DS

Too many to list.

Wii: 10
PS2: 45
GC:26
DS:18
N64:30+
GBA:50+

GB/A: About 5
PS2: Well over 30
PS3: 3
PSN: 1
PSP: 3
PC: About 20

PS3 - 3 (6 including downloadable)
360 - 15 (17 including downloadable)
Wii - 1 (Wii Sports)
PS2 - 9
PSP - 18
PS1 - 10 (mostly FF, Chrono games)
Gameboy - 7 (classics like Zelda, mario,metroid,etc.)
NES - 100+
SNES - 24
N64 - 1 (Goldeneye)
GBA - 6
PC - 6 (that will run on newer OS's) 20+ counting old,old ones.

PS2: 20 (have taken back at least another 20)
PC: about 10 or 15
PSP: about 10 (but my brother owns another 10, a couple of which I play)
PS3: 5 (should be getting 2 more this month, another 2 more in August, then loads for the rest of the year)
PSN: 2 (+ CaC whenever it is released)