Battle: Los Angeles

Complete the game on Easy Difficulty

Destroy the gas station

Survive the pool attack

Call in the airstrike to defeat the Command Center

Watch an unlocked video

Complete the game on Normal Difficulty

Kill 20 enemies with a sniper rifle

Complete a mission on Normal without dying, failing, restarting, or continuing campaign

Kill 15 enemies on the HMV turret

Kill 2 aliens with one Rocket

Complete the game on Hard Difficulty

Unlock all the unlockables