Alien Hominid HD
Alien Hominid HD has been played by members of XboxTweet. They unlocked these achievements (secret ones not listed):
- Adult Alien
Complete Game on Medium Difficulty. 
- Alien in Training
Complete Level 1-1 of the game. 
- City Destroyer
Destroy 25 buildings during one game. 
- Expert Alien
Complete the Game on Hard Difficulty. 
- Head Chomper
Head bite 50 enemies without touching the ground or firing. 
- Hungry Yeti
Eat 50 KGB Agents with the Yeti. 
- Juvenile Alien
Complete the Game on Easy Difficulty. 
- Killing Spree
Kill 1000 enemies during one game. 
- Mad Hatter
Unlock all of the 31 hats that are in the game. 
- Perfect Fight
Defeat the Final Boss without using a continue. 
- Survivalist
Survive any challenge mode for 20 minutes. 
- WMD
Reach 5000 Km in Super Soviet Missile Mastar.
