bioshock-infinite
I recently bought the BioShock Infinite Strategy guide to help me in finding all the Voxelphones and other collectibles. It came with this key key ring which is used in-game, but I can't remember where from. Is it the key given to Elizabeth by Booker to escape from the tower, or used by Elizabeth near the end of the game?
The key unlocks a chest in a house called the "Lansdowne Residence." You'll find this location from backtracking out of the Order of the Raven, over a skyhook grapple point, and through either a double doors or a skylight into a bedroom.
From the bedroom, go down two flights of stairs to the middle level. There's another bedroom and a bathroom on this floor, and the chest is in the bedroom.
In the chest is a salt recovery item and an infusion. There's also a voxophone in the room which explains why the chest (but not the key) is in the house.
Never mind I found it:
Before going through the turnstiles that lead to Comstocks home, you just have to backtrack for a bit. You get the "Return to Sender" vigor, an infusion bottle and there's a recording too.
Best Answer
It's the key they use to escape the tower.
It was one of the items in the box Booker received from the lady in the boat at the very beginning of the game.