What is your favorite Game Soundtrack.

Guilty Gear, Hotline miami and some jrpg like Final fantasy or kingdom hearts

I cant believe no one mentioned Grand Theft Autos OST (mainly from GTA Vice City to GTA IV)

Nothing can beat Ocarina of Time or Twilight Princess, but Swords and Sworcery is also amazing. :D

Cave Story (all versions of the soundtrack are awesome, but I really like the remastered versions)
Final Fantasy VIII
Terraria
Bastion
Super Mario Bros. 3
Crash Team Racing
Spyro: Year of the Dragon
Pokemon Silver/Gold

Need for Speed 3, The Sims, Red Alert 2, Unreal Tournament, Space Rangers.
Also NES games: Duck Tales 2, Darkwing Duck, Jurassic Park.

Sequence.

Disorganized Fun
Throwing Fire
Stay Crunchy

Shatter & Chime OSTs are also quite good (I haven't played Shatter yet or I'd probably like it even more!)

also this

Takeharu Ishimoto - The Price of Freedom will forever be my #1 OST. It's just... priceless.

I doubt any others will ever notice that OST though.

Legend of Mana
Nier
Chrono Cross
.hack//IOMQ
.hack//GU
Silent Hill 1 - 4 + Homecoming
Mass Effect 3
Okami
Ni no Kuni
Shin Megami Tensei Persona 1 - 4 + Golden + Eternal Punishment/Innocent Sin

Generally speaking, many RPGs tend to have really great soundtracks.

Morrowind !!!

Deus Ex Human Revolution - Michael McCann. Masterpiece of a soundtrack.

Assassins Creed 2+3 (Love Jesper Kyd and Lorne Balfe) / Darksiders 2 /Red Dead Redemption / Journey

Love the Trine 2 music!

Obviously all Nobuo Uematsu compositions (Final fantasy series)and Danny baranoswky(Binding of Isaac , Super meat boy, Cave story remastered)

Heroes of Might and Magic IV

Game's horrible, but the soundtrack's the best!

Those of the 仙剑奇侠传 and 轩辕剑 series.

All payday the heist soundtracks.

Hotline Miami!
Theme Song

Tom Clancy's H.A.W.X.

Frozen Synapse it is. The whole soundtrack is quite awesome, particularly the track "Concentrate". The Red expansion pack soundtrack is great, too.

an old game? Megaman 3 of course
my favorite now is all the soundtrack of the Painkiller Franchise

FIFA always had a great soundtrack.

Let's try a game... Try to guess each song that I chose for every game. It'll be fun. (: Also, one song per game...

Gravity Rush - though i never played it, Metal Gear Rising: Revengeance, Giana Sisters: Twisted Dreams, Super Hexagon, Portal 2, Shadows of the Damned + the spanish guitar solo at the very beginning, Metal Gear Solid 2: Sons of Liberty, The Binding of Isaac: Wrath of the Lamb, Lollipop Chainsaw i should add whole ost for this lol, Saints Row: The Third, Metal Gear Solid 4: Guns of the Patriots, Alan Wake i'm so trying not to add a second song for this game, Far Cry 3: Blood Dragon, Super Mario it's a cover - i know but it's magnificent, FIFA 2000, Lotus Esprit Turbo Challenge, Age of Mythology too bad that it's too short, Prince of Persia: The Sands of Time, Prince of Persia: Warrior Within

Of course I've forgotten lots of great games. These are from my Winamp playlist. (:

Some great songs I remeber from various games (May or may not have been told from others)

Final Fantsy X - To Zanarkand
Obscure II - Corruption With Rage and Melancholy (That song scares the SH1T out of me, great though)
Braid - Downstream
Bastion - Build That Wall (Zia's Theme)
Heroes of might and magic IV - Adventure
Trine - main theme