Okay, I'm known to be very stagnant towards games I don't like, but I'm going to leave those opinions at the door soley for my favorite game songs.

some spoilers.

5: "Nuclear Mission Jam" Half-Life (Questionable Ethics): This is where the game starts becoming good, you have just aquired a very cool super weapon (gauss gun) and this tune kicks in and it's followed by a battle with soldiers and a brilliant puzzle, perfect timing.

4: "The enemy of my enemy" Modern Warfare 2 (The Enemy of My Enemy): When I love a song from a game I don't like, than that song is fantastic. This song sets in after *spoiler* Roach and Ghost's death, your playing as Soap in this warzone, explosions are going off, everyone is trying to kill you, and this calm, sad, and melachonly tune is playing. It fits so well with the mood.

3: "The Coolant Tubes" System Shock 2 (Engineering): This song kicks in that the best time, in the scariest level. Your in small, clasutrophobic, monster filled, radiated, mazelike hallways and this song starts off calm than gets faster, it goes so well with what is going on.

2: "Deus Ex Theme" Deus Ex (Menu Screen): Okay, Deus Ex had a fantastic soundtrack, but the main theme makes a FANTASTIC first impression. It's very epic, and that's a great way to start off an epic game.

1: "Night Vision" Unreal (Terra Underground/Terraniux): It's almost like the song was tailor made for this level! The song begins with an intense sense of urgency, and it really goes well as the level is very fast paced, having you running every where. After being very fast paced it goes into this absolutley beautiful harmony sound at 1:25 that really sounds epic, and considering this level is one of the best parts of the story and game. It creates the greatest song I've ever heard in a video game.