[FF] Dirty Bubble Challenge 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.
Every enemy projectile is replaced with a Bubble of a random size.
Some flaming or explosive projectiles are replaced with Explosive Bubbles.
Homing projectiles are replaced with Fly Bubbles.
The following is unlocked for completing the [FF] Dirty Bubble Challenge challenge: Petrified Gel