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Alien in Training
5
Complete Level 1-1 of the game.
Hungry Yeti
10
Eat 50 KGB Agents with the Yeti.
Juvenile Alien
10
Complete the Game on Easy Difficulty.
Killing Spree
15
Kill 1000 enemies during one game.
Survivalist
25
Survive any challenge mode for 20 minutes.
City Destroyer
10
Destroy 25 buildings during one game.
Adult Alien
15
Complete Game on Medium Difficulty.
Expert Alien
20
Complete the Game on Hard Difficulty.
Head Chomper
20
Head bite 50 enemies without touching the ground or firing.
Mad Hatter
20
Unlock all of the 31 hats that are in the game.
Perfect Fight
30
Defeat the Final Boss without using a continue.
WMD
20
Reach 5000 Km in Super Soviet Missile Mastar.
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