Adult Alien (15) - Complete the Game on Medium Difficulty.

Alien in Training (5) - Complete level 1-1 of the game.

City Destroyer (10) - Destroy 25 buildings during one game.

Expert Alien (20) - Complete the Game on Hard Difficulty.

Head Chomper (20) - Head bite 50 enemies witout touching the ground or firing.

Hungry Yeti (10) - Eat 50 KGB Agenst with the Yeti.

Juvenile Alien (10) - Complete the Game on Easy Difficulty.

Killing Spree (15) - Kill 1000 enemies during one game.

Mad Hatter (20) - Unlock all of the 31 hats that are in the game.

Perfect Flight (30) - Defeat the final boss without using a continue.

Survivalist (15) - Surive any challenge mode for 20 minutes.

WMD (20) - Reach 5000 Km in Super Sovjet Missile Master.