Hmm... okay, this should be fun. And now that I have some time, I can count them up:

XBox: 2008-present, 3 games
Atari 2600: Birth-present, 82 games (Inherited from brother, in house before me.)
Atari 7800: 2004-present, 5 games (No AC adaptor.)
Atari XE: 2003-present, 6 games
NES: 1987-present, 87 games
SNES: 1993-present, 52 games (+21 imports)
N64: 1997-present, 12 games
GC: 2004-present, 32 games
Wii: 2007-present, 46 games
Gen: 2009-present, 1 game
Saturn: 2002-present, 2 games (+2 imports)
DC: 2005-present, 7 games (+2 imports)
PS1: 2001-present, 71 games (+6 imports)
PS2: 2003-present, 83 games (+1 import)
Famicom: 2008-present, 5 games
PSP: 2008-present, 9 games
Game Gear: 1992-present, 6 games
GB(C): 1990-present, 49 games
GBA: 1998-present, 87 games
DS: 2006-present, 76 games (+6 imports)

I think that's everything? And it better be, now that I added the XBox...

^ Dunno's roommate. The list is combined.

Nuff said.

PC = (15 games)
NES = 1989 - Present (25 games)
SNES = 2007-2007 (5 games)
N64 = 1995 - Present (20 games)
GameBoy = 1993 - Present (4 games)
GameBoy Color = 1997 - Present (5 games)
GameBoy Advance/SP = 2002 - Present (8 games)
Nintendo DS = 2007 - Present (1 game)
PSP = 2006 - Present (1 game)
PS2 = 2001 - Present (35 games)
Xbox = 2004 - Present (21 games)
Xbox 360 = 2006 - Present (20 games)

Pc- 199? (9 games)
Sega game Gear- 199? (like 2...)
GBA-2003 (Like 6)
NDS- (12)
Gamecube-2004(9)
Xbox- 2005(3)
Wii-2007(7)



I don't have a lot of systems...

1996-ish - MegaDrive - about 12-15 games (sold when I got my N64)
1999-ish - N64 - 22 games (sold in 2001, replaced 1 week later for £20 profit )
2002 (may?) - GC at launch - 15 games (inc LoZ:OoT) (sold in October 2006)
2007 (Feb 6th) - Wii - currently 15 disc games, 2 Wiiware and 9 VC.