| Achievement | How to unlock
|
|---|
- Assault Flags ( 10 points )
| - Single Player: Collect all of the Flags scattered throughout the game.
|
| - Zone Battle: Defeat all spaceships in Areas 29 & 30: Medium or Hard difficulty in one session.
|
| - Single Player: Complete 3 sequential areas on foot: Medium or Hard difficulty in one session.
|
- Heroes Campaign ( 30 points )
| - Co-Op Campaign: Complete all areas on Hard difficulty with the help of a friend.
|
| - Single Player: Capture all 3 hijackable vehicles at least once.
|
| - Single Player: Freeze 50% of infantry in any Zone: Medium or Hard difficulty in one session.
|
| - Single Player: Destroy the Mecha Orca.
|
| - Single Player: Burn 50% of infantry in any Zone: Medium or Hard difficulty in one session.
|
- Smoothie Heroes ( 20 points )
| - Co-op Campaign: Kill 100 infantry, one player freezes & the other shatters, on Hard in one session.
|
- Underground Hunters ( 20 points )
| - Co-Op Campaign: Finish all underground areas with the help of a friend: Medium or Hard difficulty.
|
- Wonder twins ( 20 points )
| - Zone Battle: Use all 4 Co-Op attacks, kill 10 units with each: Medium or Hard in one session.
|
| - Zone Battle: Complete 6 Zones, each with the help of a different Xbox Live enabled friend.
|
