Just post music from any video game you like here.

DAH- http://www.youtube.com/watch?v=jYj8rj_H4XQ

Air combat- http://www.youtube.com/watch?v=bN0Jcd_XrGg&feature=channel_video_title

FO3- http://www.youtube.com/watch?v=r5APshEyS68&feature=channel_video_title

Oblivion- http://www.youtube.com/watch?v=tQsC5IEXDag&feature=channel_video_title

L.A. noire- http://www.youtube.com/watch?v=2lwD4D_28Ec&feature=relmfu

AC2- http://www.youtube.com/watch?v=5EaRHlo4B0Y&feature=related

MP2- http://www.youtube.com/watch?v=q-aM98uYiDo&feature=channel_video_title

Dead space- http://www.youtube.com/watch?v=ZR-QiwAln1Q&feature=channel_video_title

A boy and his blob- http://www.youtube.com/watch?v=CaQCZvCy5M4&feature=channel_video_title

SS2- http://www.youtube.com/watch?v=HRRtq6DaBcE&feature=channel_video_title

JC2- http://www.youtube.com/watch?v=BeU-SPxoIy4&feature=channel_video_title

DAH2- http://www.youtube.com/watch?v=d2_vWYBJu0M&feature=related

Deadly premonition- http://www.youtube.com/watch?v=5OUP_Z3iZPs

Ape Escape- http://www.youtube.com/watch?v=qJ5FKOuexXo

FOV- http://www.youtube.com/watch?v=FcKIy2nJlRA&feature=channel_video_title

Dead rising- http://www.youtube.com/watch?v=zEX7joB0wf0&feature=channel_video_title

Bully- http://www.youtube.com/watch?v=FvNmnsVxsbc&feature=relmfu

Super meat boy- http://www.youtube.com/watch?v=mWiAbzJQNj0&feature=channel_video_title

JF2- http://www.youtube.com/watch?v=He7J2BwoMXU&feature=channel_video_title

Clock tower- http://www.youtube.com/watch?v=5fvPltYhBzY&feature=channel_video_title

the music in Castle Crashers is really good, i cannot really think of anything else, right now.
http://www.youtube.com/watch?v=ti04fnMvRdE&feature=related there are probably better ones, i haven't been listening to them that often anymore

Portal 2 - http://www.youtube.com/watch?v=dVVZaZ8yO6o

Borderlands - http://www.youtube.com/watch?v=LnSp9rgfel8

Dark Souls - http://www.youtube.com/watch?v=jSXQYgZQw3c

TF2 - http://www.youtube.com/watch?v=5eDGD7kwsxM

Halo

Mass Effect

Portal

Half-Life 2

And the best of them all...

The Battle For Wesnoth (F2P turn-based heroic fantasy RPG) has some very nice music & player-made add-ons :)

GTA IV - http://www.youtube.com/watch?v=nKQr2G8mk0s

Shellshock 2 - http://www.youtube.com/watch?v=508vUTeGqaA

MAG - http://www.youtube.com/watch?v=SxdxQL1z2Tw

Black Ops - http://www.youtube.com/watch?v=Z4ECh5KSJDQ

Battlefield: Bad Company - http://www.youtube.com/watch?v=6gk_3NuiX2M

Burnout Paradise - http://www.youtube.com/watch?v=pfRF1pHjxqg

All the music from Super Meat Boy.

And that is my long list of music.....

Shadow of the Colossus had a simply amazing soundtrack. I used to have the whole soundtrack on my ipod, it's that good. Fully orchestrated.

these one's are probably my favourite.
http://www.youtube.com/watch?v=iRqfpmzofno
http://www.youtube.com/watch?v=ix38fnllF3Y

some others
http://www.youtube.com/watch?v=EKIdR_JYxTg
http://www.youtube.com/watch?v=nHcF7Ai6jUs
http://www.youtube.com/watch?v=A34idVtcXHs

http://www.youtube.com/watch?v=ccAq4LlkphE&feature=related (is dubstep from the mirrors edge theme song (still alive)
original song: http://www.youtube.com/watch?v=TERyxFfMqDk

Donkey Kong Country:
http://www.youtube.com/watch?v=m7I9fI00baQ
http://www.youtube.com/watch?v=9vOoKyQpZA0&feature=related

Its sequel (Its all good, but these are the best):
http://www.youtube.com/watch?v=11FFWIC39RQ&feature=related
http://www.youtube.com/watch?v=zGllMxdI8nM&feature=related
http://www.youtube.com/watch?v=nE1fxUNm6hM&feature=related

Chrono trigger:
http://www.youtube.com/watch?v=xFKTI7NiNKA
http://www.youtube.com/watch?v=A0_VLUXraTw&feature=related

Half life:
What kind of hospital is this!?
http://www.youtube.com/watch?v=1VHUhxfgJqQ

Vortal Combat.
http://www.youtube.com/watch?v=RZRNd6osQrk

Shadow of Colossus music ftw!

I dont even know if theres a english version of the game but thats a song I always remember from playing that game xD

Moorhuhn: Der Schatz des Pharao http://www.youtube.com/watch?v=wVW4E8QsIx8
(The Treasure of the Pharao)

Everything from Test Drive 7, basically determined my music taste :P

MW2- http://www.youtube.com/watch?v=NFDo_DTDCSM

Black Ops- http://www.youtube.com/watch?v=NU6mxPu1GKY

My favorite music to listen to while playing AoS- http://www.youtube.com/watch?v=2aJUnltwsqs&ob=av2e

Half Life 2 and LoZ: Ocarina of Time

TWEWY.
I'll post more later.

All of the LoZ games
(OoT) Windmill - http://www.youtube.com/watch?v=yGvNVcM6AkI
(MM) Clocktown all days:
Day 1 - http://www.youtube.com/watch?v=dtz-qGWKNOw
Day 2 - http://www.youtube.com/watch?v=vRjRvFietdc&feature=related
Day 3 - http://www.youtube.com/watch?v=IjXutKsizE8&feature=related
Clock Town Final Hours - http://www.youtube.com/watch?v=knLCbS02T1Y&feature=related
Majora's Theme - http://www.youtube.com/watch?v=IQ_BQX88g0k&feature=related
Deku Nut's Palace - http://www.youtube.com/watch?v=-dZ-iMFGY3Q&feature=related

^:D +1.
I finished MM only a week ago.

I love the dark feel to it.

Same.

All these soundtracks are awesome.

Devil May Cry 3: http://www.youtube.com/watch?v=AFaGZp8h0IA

Bayonetta: http://www.youtube.com/watch?v=Sx8auKK-Ok4

The music from the STALKER series is definitely my favorite.

http://www.youtube.com/watch?v=5XZfD1HCI7s

The dynamic music that's played during firefights is incredible.

http://www.youtube.com/watch?v=p5m3oeWWHqM&feature=related
http://www.youtube.com/watch?v=ao16a0EZseE&feature=related

Believe it or not, Call of Duty.
Game sucks, but music is good as activision blows through their money.

^Yuuuup^

I forgot about the music in Doom, some of it is really amazing.
http://www.youtube.com/watch?v=BSsfjHCFosw
http://www.youtube.com/watch?v=bYVX6b9svuE
http://www.youtube.com/watch?v=tEAYqiKFk9c
http://www.youtube.com/watch?v=L5KVMnS9zgY
there is more and better ones, but i can't think of my favorite one right now

If you like old 8 bit music here is a cool site for amiga music:
http://www.chiptune.com/

The site is pretty cool, makes your browser look like the old amiga desktop.

Old 8 bit music radio:
http://www.di.fm/chiptunes/

This is my all time favorite:
http://www.kohina.com/

Lots of good old school music from the Commodore 64, Amstrad, Amiga, Atari ST, and a bunch of other ancient systems.

Be warned ... If you are not from this era, the music sounds like a broken cel-phone ringer.