[FF] The Gauntlet is a challenge in Fiend Folio, a mod for The Binding of Isaac.

There are no starting items defined for this challenge.

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

Isaac starts with 3¢ and no bombs.

The challenge takes place in a single custom-made stage whose goal is to defeat every single boss and mini-boss added in Fiend Folio, with the exception of Hermit.

The challenge consists of multiple sections with a unique boss, each featuring a hub area that offers items and consumables for purchase.

Stage paths are blocked with Colored Locks, the only way to unlock them being by defeating bosses, which each drop a Colored Puzzle Key corresponding to these locks, in addition to 7 Pennies.

Entering a section causes the previous section's door to be permanently sealed.

The following is unlocked for completing the [FF] The Gauntlet challenge: Community Achievement

• Check out the challenge description on the mod's external Wiki.
• Download Fiend Folio from the Steam Workshop.