Survive any challenge mode for 20 minutes.
Complete Game on Medium Difficulty.
Complete the Game on Hard Difficulty.
Unlock all of the 31 hats that are in the game.
Eat 50 KGB Agents with the Yeti.
Head bite 50 enemies without touching the ground or firing.
Reach 5000 Km in Super Soviet Missile Mastar.
Kill 1000 enemies during one game.
Destroy 25 buildings during one game.
Defeat the Final Boss without using a continue.
Complete the Game on Easy Difficulty.
Complete Level 1-1 of the game.