Complete the first mission
Complete the twelfth mission
Complete the thirteenth mission
Complete the fourteenth mission
Complete the fifteenth mission
Complete the sixteenth mission
Complete the seventeenth mission
Complete the eighteenth mission
Use the Stun Baton
Completed the game on the hardest difficulty setting.
Completed the game on any difficulty setting.
Complete the second mission
Use the Flamethrower
Contact your team and escaped Comms without being attacked by an android
Use the Shotgun
Use the Revolver
Escape from android combat without taking damage
Cause the Alien to retreat using a molotov
Encountered the Alien in Sevastopol for the first time
Cause the Alien to retreat by using the flamethrower
Knock down a human or stunned an android with a non-lethal attack
Completed the game without killing any humans
Complete the third mission
Navigated Reactor Maintenance without dying
Complete the fifth mission without being killed by the Alien
Turned off the beacon
Completed the game without dying
Use the Bolt Gun
Kill an android using only the maintenance jack
Kill an android
Kill 10 Humans
Perform 10 successful hacks
Complete 10 minigames successfully
Complete the fourth mission
Access 10 different rewire points
Use the vent system 20 times
Detect 30 targets with the motion tracker
Collect an ID tag
Collect all ID Tags
Collect 10 Nostromo logs in the main campaign
Collect an archive log
Collect 100 archive logs
Construct an item
Construct one of each craftable item
Complete the fifth mission
Get killed by the Alien 100 times
Complete the sixth mission
Complete the seventh mission
Complete the tenth mission
Complete the eleventh mission
