Keeper in rottenland is a challenge in Beyond, a mod for The Binding of Isaac.

Wooden Nickel
Rusted Key
2x Key
Woven Purse

Note: this list does not include characters' default starting items.

Special rooms are replaced by Rotten Rooms.
Beggars of all types are replaced by Rotten Beggars.
Hearts of all types are replaced by Rotten Hearts.

The following is unlocked for completing the Keeper in rottenland challenge: Decay

• Download Beyond from the Steam Workshop.