Perform 10 successful hacks

Complete the thirteenth mission

Complete the game on the hardest difficulty setting

Collect an archive log

Kill 10 humans

Complete the eighteenth mission

Use the revolver

Collect 10 Nostromo logs in the main campaign

Use the vent system 20 times

Collect an ID tag

Construct an item

Complete the fifth mission without being killed by the Alien

Escape from android combat without taking damage

Complete the game without dying

Complete the game on any difficulty setting

Complete the seventh mission

Collect all ID tags

Complete the fourteenth mission

Kill an android using only the maintenance jack

Construct one of each craftable item

Use the flamethrower

Complete the second mission

Collect 100 archive logs

Use the shotgun

Complete the fifteenth mission

Contact your team and escape Comms without being attacked by an android

Complete the game without killing any humans

Complete the fifth mission

Complete the fourth mission

Complete the first mission

Complete the eleventh mission

Turn off the beacon

Complete 10 minigames successfully

Complete the third mission

Encounter the Alien in Sevastopol for the first time

Knock down a human or stun an android with a non-lethal attack

Complete the twelfth mission

Cause the Alien to retreat using a molotov

Detect 30 targets with the motion tracker

Kill an Android

Use the bolt gun

Navigate Reactor Maintenance without dying

Complete the sixteenth mission

Access 10 different rewire points

Get killed by the Alien 100 times

Complete the seventeenth mission

Complete the sixth mission

Cause the Alien to retreat by using the flamethrower

Use the stun baton

Complete the tenth mission