Cat Got Your Tongue is an unlockable challenge in The Binding of Isaac.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this challenge for the previous Repentance version, check this page instead.

Guppy's Tail
Guppy's Head
Guppy's Hairball

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

There are no additional notes, rules, or conditions defined for this challenge.

Based on the rules set in the .xml file, the following special rooms are disabled during this challenge:

The following is unlocked for completing the Cat Got Your Tongue challenge: Algiz

Obtain the Guppy transformation.

• Check out the challenge description on the external Isaac Wiki.