Tekken
Tekken 5 - Sparking! - https://www.youtube.com/watch?v=hUwupgqpTv8
Tekken Tag Tournament - King's Theme - https://www.youtube.com/watch?v=U5pMV2fYbTk
Tekken 6 - Azazel's Chamber - https://www.youtube.com/watch?v=K8FjfQz0iW0
Final Fantasy
Final Fantasy VII - Cid's Theme - https://www.youtube.com/watch?v=SJzfOA9uV6E
Final Fantasy VII - Highwind takes to the Sky - https://www.youtube.com/watch?v=0dnl6NoEVdo
Final Fantasy VII Crisis Core - A Flower Blooming in the Slums - https://www.youtube.com/watch?v=qq2SzNB0oEE
Final Fantasy VIII - Love Grows - https://www.youtube.com/watch?v=NBWCTYE3Dcc
Final Fantasy VIII - the Extreme - https://www.youtube.com/watch?v=RVkcmx2l3WA
Final Fantasy IX - You're Not Alone - https://www.youtube.com/watch?v=yUrC5R30Ofk
Final Fantasy X - Sending to Another Dimension - https://www.youtube.com/watch?v=ZiSTywA6fHY
Final Fantasy X - to Zanarkand - https://www.youtube.com/watch?v=eKyvAjoIvAI
Suikoden
Suikoden - An Old Irish Song - https://www.youtube.com/watch?v=Qqp90Z6Bzks
Suikoden - Avertuneiro Antes Lance Mao - https://www.youtube.com/watch?v=RFQqXxe9dqk
Suikoden 2 - Intro Theme - https://www.youtube.com/watch?v=jWTAAH8S6C4
Vandal Hearts
Vandal Hearts - Burning Sorrow - https://www.youtube.com/watch?v=o8FVfsuj0lQ
Deus Ex
Deus Ex - Main theme - https://www.youtube.com/watch?v=XxMf4BdVq_g
Cannon Fodder
Cannon Fodder - War, Never Been so much Fun - https://www.youtube.com/watch?v=5Fl1pCPb504
Jurrasic Park the Lost World
Jurrasic Park the Lost World - San Diego - https://www.youtube.com/watch?v=aXTspZhM05A&list=PLD6E4985C2AA8AA00
Batman Arkham City
Batman Arkham City - Main Theme - https://www.youtube.com/watch?v=SXKrsJZWqK0
Civilization IV
Civilization IV - Baba Yetu - https://www.youtube.com/watch?v=IJiHDmyhE1A
World of Warcraft
World of Warcraft - Arthas, My Son - https://www.youtube.com/watch?v=VU7qTVkjMWU
World of Warcraft - The Dark Portal - https://www.youtube.com/watch?v=fFo2uPJBbYk
World of Warcraft - Season's of War - https://www.youtube.com/watch?v=QJImJRumPUY
World of Warcraft - Mountains of Thunder - https://www.youtube.com/watch?v=eSf2jO_E_Sk
Kingdom Hearts
Kingdom Hearts - Hikari - https://www.youtube.com/watch?v=CZVAvHah9io
ZombiU
ZombiU - God Save the Queen - https://www.youtube.com/watch?v=AsC7ILz7eIE
Legend of Zelda Ocarina of Time
Zelda Ocarina of Time - Gerudo Valley - https://www.youtube.com/watch?v=Hy0aEj85ifY
Mass Effect
Mass Effect - Vigil - https://www.youtube.com/watch?v=IitCQCaKi3E
Mass Effect 2 - Suicide Mission - https://www.youtube.com/watch?v=VTsD2FjmLsw
Mass Effect 3 - Leaving Earth - https://www.youtube.com/watch?v=KGHA9oO1Ybg
Flower
Flower - Purification of the City - https://www.youtube.com/watch?v=w7YfSEyuIcg
Max Payne 2
Max Payne 2 - Main Theme - https://www.youtube.com/watch?v=u116HbMOF_Y
Uncharted 2 Among Thieves
Uncharted 2 - Nate's Theme - https://www.youtube.com/watch?v=nkPF5UiDi4g
Portal
Portal - Still Alive - https://www.youtube.com/watch?v=Y6ljFaKRTrI
Portal 2 - Cara Mia Addio - https://www.youtube.com/watch?v=tL_TFXbSnLY
Street Fighter
Street Fighter Ex plus Alpha - God Hands - https://www.youtube.com/watch?v=CaCjeQGAXWk
Street Fighter Ex plus Alpha - Guardian of Light - https://www.youtube.com/watch?v=cZMhDLXL3ZI
Street FIghter II - Vega Stage Theme - https://www.youtube.com/watch?v=r3A2tr-ndbk
Soul Blade
Soul Blade - A Tale of Soul and Swords - https://www.youtube.com/watch?v=5Jscuco8zEk
Dead or Alive 2
Dead or Alive 2 - Exciter - https://www.youtube.com/watch?v=oQwvMoXgJPw
Killzone 2
Killzone 2 - Helghan Forever - https://www.youtube.com/watch?v=xPPXnU4vR2k
Command & Conquer Red Alert
Command and Conquer Red Alert - Hell March - https://www.youtube.com/watch?v=Tb-gI_pFog0
Broken Sword Shadow of the Templars
Broken Sword Shadow of the Templars - Intro Theme - https://www.youtube.com/watch?v=hE3BEf9F3HI
Heart of Darkness
Heart of Darkness - Intro Theme - https://www.youtube.com/watch?v=leMR1PJz5L4
Music (PSone Game)
Music (the PSone Game) - Freedom - https://www.youtube.com/watch?v=9eU0oISZZok
Rainbow Six Rogue Spear
Rainbow Six Rogue Spear - Main Theme - https://www.youtube.com/watch?v=ZiSTywA6fHY
The Elder Scrolls IV Skyrim
Skyrim - Dragonborn (Main Theme) - https://www.youtube.com/watch?v=eVVXNDv8rY0
Sniper Elite
Sniper Elite V2 - Main Theme - https://www.youtube.com/watch?v=UznVW6BVJWw
Sniper Elite Nazi Zombie Army - Main Theme - https://www.youtube.com/watch?v=y9VVKpKbCFc
Metal Gear Solid 2 Sons of Liberty
Metal Gear Solid 2 - Main Theme - https://www.youtube.com/watch?v=QiPon8lr48U
Bubble Bobble
Bubble Bobble - Main Theme - https://www.youtube.com/watch?v=VTmJJ0lUyQc
Fahrenheit (Indigo Prophecy)
Fahrenheit (Indigo Prophecy) - Lucas Theme - https://www.youtube.com/watch?v=80J8HwDXjLc
Fahrenheit (Indigo Prophecy) - Carla's Theme - https://www.youtube.com/watch?v=de5ONSJ_e2Q
Sonic the Hedgehog
Sonic the Hedgehog 2 - Wing Fortress Zone Theme - https://www.youtube.com/watch?v=_08z00qzfpw
Sonic the Hedgehog 2 - Sky Chase Zone Theme - https://www.youtube.com/watch?v=TrEITpTUB4c
Pit Fighter
Pit Fighter - Main Theme - https://www.youtube.com/watch?v=0-cPAMgM1WY
Xenogears
Xenogears - The WInd Calls to Shevat - https://www.youtube.com/watch?v=Z5fNnRUhpdQ
Killer Instinct
Killer Instinct - Main Theme - https://www.youtube.com/watch?v=avPSzGVCPH0
Alex Kidd in Miracle World
Alex Kidd in Miracle World - Main Theme - https://www.youtube.com/watch?v=y9Cf75Xnxw8
Journey
Journey - Nascense - https://www.youtube.com/watch?v=6LyyLYxdpUQ
EDIT: Tidied my post up a bit
EDIT2: linked wrong song for Tekken 5 - fixed!
The best way to find out if you can trust somebody is to trust them.
Ernest Hemmingway