Unlockables - Complete each achievement to get the allotted gamerscore.
Ace (20) Earn 185,000 points.
Diplomat (15) Complete a level without firing.
Epic Warrior (10) Form a four-ship (epic) formation.
Exterminator (15) Destroy all enemies in a level.
Halfway Point (5) Finish Mission 3 on any difficulty.
Hero (25) Complete the game on Normal.
Immortal (15) Complete a level without dying or losing allies.
Legend (50) Complete the game on Insane.
Rookie (5) Earn 30,000 points.
Teamwork (15) Score 10,000 points while attached in a level.
Untouchable (15) Complete a level without taking damage.
Veteran (10) Earn 100,000 points.
