Gamerscore Gamerscore:
Alien Training - 5 Gamerscore:
Complete level 1-1.
WMD - 20 Gamerscore:
Get 5000 km in Super Soviet Missile Master.
Survivalist - 25 Gamerscore:
Stay alive in any challenge mode for 20 minutes.
Flawless Flight - 30 Gamerscore:
Defeat the last Boss without using a continue.
Mad Hatter - 20 Gamerscore:
Get all 31 hats.
Death Spree - 15 Gamerscore:
Slay 1,000 foes during one game.
Juvenile Alien - 10 Gamerscore:
Complete the game on Easy Difficulty.
Insatiable Yeti - 10 Gamerscore:
Consume 50 KGB Agents with the Yeti.
Head Biter - 20 Gamerscore:
Head chomp 50 foes without touching the ground or shooting.
Expert Alien - 20 Gamerscore:
Complete the game on Hard Difficulty.
City Destroyer - 10 Gamerscore:
Demolish 25 buildings during a single game.
Adult Alien - 15 Gamerscore:
Complete the game on Medium Difficulty.
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