Graphics: Half Life 2

Vehicles: Halo 2

Weapons: Half Life 2

Enemy AI: Half Life 2

Friendly AI: Halo 2

Maps: Half Life 2

Story: Half Life 2 (The whole HL story is cool)

Music: Halo 2

Sound: Half Life 2

Physics: Half Life 2

Characters: Half Life 2

Cooler Armor: Halo 2 (helmet = rock

"Drama" factor: Half Life 2

"Scare" Factor: Half Life 2 (Halo 2 isnt ment to be scary)

Gameplay: Half Life 2

Potential for a Movie: both

Overall: Half Life 2 blew away Halo 2 but thats PC vs Console...