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