|Kill 500 aliens.|
This will unlock naturally as you progress through the game as the main purpose of most missions is to kill all aliens. Depending on how many side missions you choose to complete, this may take more than one play through.
|Rate this achievement||Average Rating|
|You need to register before being able to post comments.|
|You need to log in or register to use MyAchievements.|
|You need to log in or register to rate games.|
User Score is based on 154 user ratings.