Amnesia: The Bunker

You need the Wrench from the foreman's locker before you can get this. Might be worth making a save before trying this too. Ideally you need at least one revolver shot too but you could use anything else to distract the beast in practice.

Once you do have it, head to the Prison and enter the control room using the wrench on the small vent which can be found in the south eastern side of the room just past the cells on your left.

Once you're in the control room you'll see the buttons corresponding to the cells. You'll want to focus on the 3rd one up on the right. Before you open it, make sure the door on your left is open. When ready, flip the corresponding switch, sprint out and into the cells and enter the 3rd one on the right, grab the cutters and run back to the start of the hall. The monster should crawl out of one of the cells so make sure you shoot / distract it, then run back into the control room and close the cell before the monster can get the prisoner.


Note: the location of the prisoner cannot change.

Missable

This takes place during the prison section of the game after you get the wrench.

Use the wrench on the vent to sneak into the main part of the room where there is a control panel that unlocks the prison cells. For this achievement you need to open the prison cell, run and grab the cutters, run back to the control panel, and then close the cell before the beast gets to the prisoner.

The beast will always come out of the same hole across from the prisoner. If you have a gas grenade you can through a gas grenade in front of the hole, run back to open the prison cell, grab the cutters then close the cell again without the beast ever coming out. You can also try to block it with a barrel.

There is a save lamp in this room so make sure you save before trying in case you mess up.

Missable

This takes place during the prison section of the game after you get the wrench.

Use the wrench on the vent to sneak into the main part of the room where there is a control panel that unlocks the prison cells. For this achievement you need to open the prison cell, run and grab the cutters, run back to the control panel, and then close the cell before the beast gets to the prisoner.

The beast will always come out of the same hole across from the prisoner. If you have a gas grenade you can through a gas grenade in front of the hole, run back to open the prison cell, grab the cutters then close the cell again without the beast ever coming out. You can also try to block it with a barrel.

There is a save lamp in this room so make sure you save before trying in case you mess up.

Video Linked Below!

Natural Story Progression Required (Missable)
This can be complete after obtaining the Wrench from Foreman Stafford's Locker.

The Main thing to Note is to Open a Cell next to the German before opening his Cell. Doing so will trigger the Beast to Spawn from there and not in the German's cell. Be Quick to make your way to the German after opening his Cell and form a "Barrier" between the German and the Beast using your Body. Once Beast has Retreated acquire Cutters and Sprint back to Lockdown Room to Lock in the German Preserving his Life in the Process.

"Life Preserver"

Video Linked Below!

Natural Story Progression Required (Missable)
This can be complete after obtaining the Wrench from Foreman Stafford's Locker.

The Main thing to Note is to Open a Cell next to the German before opening his Cell. Doing so will trigger the Beast to Spawn from there and not in the German's cell. Be Quick to make your way to the German after opening his Cell and form a "Barrier" between the German and the Beast using your Body. Once Beast has Retreated acquire Cutters and Sprint back to Lockdown Room to Lock in the German Preserving his Life in the Process.

"Life Preserver"