Here is the full list of all 50 Alien: Isolation (Windows) achievements worth 1,000 gamerscore.
Get killed by the Alien 100 times
Completed the game without dying
Kill 10 Humans
Kill an android using only the maintenance jack
Completed the game on any difficulty setting.
Completed the game on the hardest difficulty setting.
Completed the game without killing any humans
Complete the eighteenth mission
Collect all ID Tags
Complete the seventeenth mission
Collect 10 Nostromo logs in the main campaign
Cause the Alien to retreat using a molotov
Complete the sixteenth mission
Complete the fifteenth mission
Complete the fourteenth mission
Complete 10 minigames successfully
Navigated Reactor Maintenance without dying
Use the Bolt Gun
Complete the thirteenth mission
Complete the twelfth mission
Complete the eleventh mission
Collect 100 archive logs
Use the Shotgun
Complete the tenth mission
Cause the Alien to retreat by using the flamethrower
Use the Flamethrower
Turned off the beacon
Detect 30 targets with the motion tracker
Knock down a human or stunned an android with a non-lethal attack
Use the Stun Baton
Complete the seventh mission
Perform 10 successful hacks
Complete the sixth mission
Construct one of each craftable item
Complete the fifth mission
Complete the fifth mission without being killed by the Alien
Complete the fourth mission
Contact your team and escaped Comms without being attacked by an android
Use the vent system 20 times
Access 10 different rewire points
Kill an android
Escape from android combat without taking damage
Complete the third mission
Encountered the Alien in Sevastopol for the first time
Use the Revolver
Complete the second mission
Construct an item
Collect an ID tag
Complete the first mission
Collect an archive log