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