Here is the full list of all 22 Strangeland achievements.
The Stranger escaped Strangeland.
The Stranger killed himself.
The Stranger died fighting.
The Stranger jumped.
Talked to all the major characters.
Got the final knife.
Died every possible way.
Exited the Hall of Mirrors.
Reached the Hall of Mirrors.
Correctly identified the Young, Middle Age, and Old Strangers.
Got Tooth.
Resisted opening the box.
Heard all the Clown's jokes.
Gathered all the spirits using the torch.
Opened the box.
Lasted as long as Rosencrantz and Guildenstern.
Killed the Crab.
Persuaded Nineveh to hone Beak.
Released the Dark Thing.
Got Beak.
Won the Shooting Gallery on the highest speed.
Starting Out.