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