| Unlockable: | How to Unlock: |
| Adult Alien (15 Pts) | Complete Game on Medium Difficulty. |
| Alien in Training (5 Pts) | Complete level 1-1 of the game. |
| City Destroyer (10 Pts) | Destroy 25 buildings during one game. |
| Expert Alien (20 Pts) | Complete the Game on Hard Difficulty. |
| Head Chomper (20 Pts) | Head bite 50 enemies witout touching the ground or firing. |
| Hungry Yeti (10 Pts) | Eat 50 KGB Agenst with the Yeti. |
| Juvenile Alien (10 Pts) | Complete the Game on Easy Difficulty. |
| Killing Spree (15 Pts) | Kill 1000 enemies during one game. |
| Mad Hatter (20 Pts) | Unlock all of the 31 hats that are in the game. |
| Perfect Flight (30 Pts) | Defeat the final boss without using a continue. |
| Survivalist (25 Pts) | Survive any challenge mode for 20 minutes. |
| WMD (20 Pts) | Reach 5000 Km in Super Sovjet Missile Master. |
