| Achievement | How to unlock | Points
|
|---|
| Blood-thirtsy | Eat ten downed soldiers hearts. | 25
|
| Braaaaains | Eat ten downed soldiers brains. | 25
|
| Decision | Kill or save your first downed soldier. | 25
|
| Die A Dozen Deaths | Die twelve different ways. | 50
|
| Encounter The Entity | Defeat the true final boss. | 100
|
| From My Cold Dead Hands | Get all human gun upgrades. | 100
|
| He Had to Split | Dismember fifty enemies. | 50
|
| Hero | Rescue every downed soldier. | 100
|
| Phasers on Kill | Max out alien gun upgrades. | 100
|
| Savior | Rescue ten downed soldiers. | 25
|
| Serial Killer | Kill every downed soldier. | 100
|
| Skewered | Kill three enemies in one throw. | 25
|
| Star Spore | Capture a Star Spore. | 50
|
| Stick Around | Spear enemies to the wall. | 50
|
| Tarzan | Swing a far distance without touching the ground. | 50
|
| Ultimate Weapon | Max out the ChainStaff. | 100
|
| Well Don't Take My Head Off About It | Decapitate an active soldier with the Super Spear. | 25
|