Complete the following tasks during gameplay to unlock the corresponding achievements and their corresponding GamerScore.

Alien in Training - GamerScore 5:
Complete Level 1-1 of the game.

City Destroyer - GamerScore 10:
During one game destroy 25 buildings.

Juvenile Alien - GamerScore 10:
On Easy difficulty complete the Game.

Hungry Yeti - GamerScore 10:
Eat 50 KGB Agents with the Yeti.

Killing Spree - GamerScore 15:
During one game Kill 1000 enemies.

Adult Alien - GamerScore 15:
On Medium difficulty complete the Game.

Survivalist - GamerScore 15:
Surive any challenge mode for 20 minutes.

Expert Alien - GamerScore 20:
On Hard difficulty complete the Game

Head Chomper - GamerScore 20:
Without touching the ground or firing 'head bite' 50 enemies.

Mad Hatter - GamerScore 20:
Unlock ALL of the 31 hats that are in the game.

WMD - GamerScore 20:
Reach 5000 Km in Super Sovjet Missile Master.

Perfect Flight - GamerScore 30:
Defeat the final boss without using a continue.

Was it useful? Rate it!

Something wrong?