Full list of all 44 Amnesia: The Bunker achievements worth 1,040 gamerscore. It takes around 8-10 hours to unlock all of the achievements in the base game.
The base game contains 42 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 2 achievements worth 40 Gamerscore.
Collected all the other achievements.
Found the Adminstrator's office.
Released the emergency lockdown.
Heard the message on the radio.
Found the Cutters.
Retrieved the Foreman's dogtag.
Found the Dynamite.
Found the detonator handle.
Finished the game.
Retrieved every note.
Opened all the lockers.
Completed the game faster than all developers at Frictional.
Quit the game right as things got interesting.
Found all the maps.
Acquired the gas mask.
Acquired the lighter.
Found all pocket bags.
Got the cutters and locked the cell again without the German Prisoner dying.
Discovered the beast's nest in the chapel.
Acquired the shotgun.
Acquired the rabbit doll.
Sent the beast back into the screaming darkness.
Burnt a corpse to a nice char.
Hurt the beast by triggering a trap.
Blew up a door with a barrel.
Used meat to lure rats away from a corpse.
Lit up a fuel puddle.
Used gas on the beast.
Completed the game without saving.
Never dropped nor stored an item.
Disarmed a trap.
Showed the beast the bunny.
Re-acquired the rabbit doll.
Escaped the bunker.
Burnt a lot of dead bodies.
Opened every vent and cut every chain.
Blew open a door with a shotgun.
Blasted a rat with a shotgun.
Blocked the beast's path out of a hole.
Blew up lots of rats with a single grenade.
Survived first encounter with the beast.
Shot at the visions in the tunnels.
Completed the game on a custom difficulty level.
Completed the game on Shell Shock difficulty.