Unlockables
     Complete each achievement to get the allotted gamerscore.

Unlockable:              How to Unlock:

Moby Dick (5)            Single Player: Destroy the Mecha Orca.

Hot-wired (5)            Single Player: Capture all 3 hijackable 
                         vehicles at least once.

Pyromaniac (10)          Single Player: Burn 50% of infantry 
                         in any Zone: Medium or Hard difficulty 
                         in one session.

Ice Cold (10)            Single Player: Freeze 50% of infantry 
                         in any Zone: Medium or Hard difficulty 
                         in one session.

Assault Flags (10)       Single Player: Collect all of the Flags 
                         scattered throughout the game.

Fearless (20)            Single Player: Complete 3 sequential areas 
                         on foot: Medium or Hard difficulty 
                         in one session.

Wonder twins (20)        Zone Battle: Use all 4 Co-Op attacks, 
                         kill 10 units with each: Medium or Hard 
                         in one session.

Zoned Out (25)           Zone Battle: Complete 6 Zones, each 
                         with the help of a different LIVE enabled 
                         friend.

Escapist (25)            Zone Battle: Defeat all spaceships 
                         in Areas 29 & 30: Medium or Hard difficulty 
                         in one session.

Smoothie Heroes (20)     Co-op Campaign: Kill 100 infantry, one player 
                         freezes & the other shatters, on Hard 
                         in one session.

Underground Hunters (20) Co-Op Campaign: Finish all underground areas 
                         with the help of a friend: Medium or Hard 
                         difficulty.

Heroes Campaign (30)     Co-Op Campaign: Complete all areas on Hard 
                         difficulty with the help of a friend.