Vanilla Tweaks
While the majority of content in Fiend Folio only adds new features to the game without modifying some of the existing gameplay mechanics of The Binding of Isaac: Repentance, there is a still a large handful of exceptions that expand some existing elements, and drastically change the feel of the game.
Stage Additions
The stages are more alive than ever! From discovering prehistoric caves to exploring abandoned sewer plants, Fiend Folio adds new backdrops and changes to each floor to solidify their theme and feeling.
- Main Article: Stage Additions
Poop Spells
Tainted ??? can now use new varieties of poop with Fiend Folio: Reheated, some of them utilizing the MOD's own unique Poop obstacles.
Name | Icon | Appearance | Effect |
---|---|---|---|
Shampoo | ![]() |
![]() |
|
Cursed Poop | ![]() |
![]() |
|
Evil Poop | ![]() |
![]() |
|
Fuzzy Poop | ![]() |
![]() |
|
Dip | ![]() |
|
Pill Colors
Fiend Folio: Reheated also added new pill colors to memorize! These have a chance of appearing in place of the regular vanilla pill colors encountered.
Note: These new pill colors are purely cosmetic; they do not correlate to the types of possible pill effects, nor number of pill effects that appear in the pill pool, which will always remain at 13 per run.
Pill Colors | |||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
For the new pills and their effects added in Fiend Folio, see Pills.
Vanilla Enemy Changes
Besides adding new enemies, Fiend Folio also modifies and improves a few existing ones. These modifications can be toggled in the Dead Sea Scrolls menu of the MOD.
Dank Squirt
Dank Squirts will no longer split into two
Clots. Instead, they will spawn several
Blots along with a small shower of tar projectiles, and leaving behind a puddle of slowing black creep.
Swinger
If the base of a Swinger is killed, it will spawn a
Maw with a unique appearance that looks identical to the Swinger's head.
Blue Conjoined Fatty
Blue Conjoined Fatties have a unique appearance when encountered in
The Chest, resembling the character
??? instead of
Hush.
Hosts
Hosts spawned from
Skulls will have a different appearance, depending on the floor or room type.
All these Hosts also have unique Red Host appearances when their skull is removed by
Mom's Bracelet.
Depths Host.
Necropolis Host.
Dank Depths Host.
Mausoleum Host.
Mausoleum Host, after
Mom's Heart has been killed.
Gehenna Host.
Sheol Host.
The Siren's skull Host.
Lil Portal
Lil Portals are now able to spawn some of the following insects added in Fiend Folio:
Lil Portals will also have a unique skin if encountered in Gehenna, giving them a red appearance.
Waiting Enemies
Several of Fiend Folio's foes, along with a plethora of vanilla enemies, have received a special "waiting" variant.
Waiting enemies will not spawn immediately when Isaac enters the room, but only after all other enemies have been defeated. Each enemy has their own way of appearing in the battlefield, such as burrowing enemies appearing from beneath Isaac's feet, leaping enemies falling from off-screen, or spider enemies rappelling down from the ceiling with spider silk!
- If Isaac is standing in the same spot where an enemy would appear, it will wait until Isaac moves out of the way before doing so.
| |||||
Boss Rush
As well as adding new bosses, Fiend Folio also expands Boss Rush by adding some of its new bosses, as well as including some that were missing from the vanilla game!
The following bosses in Fiend Folio have been added to Boss Rush:
Fiend Folio bosses will not be champions during a champion Boss Rush.
The following bosses from the vanilla game have been added to Boss Rush:
Baby Plum
Rag Mega
Big Horn
Bumbino
Sisters Vis
The Pile
Reap Creep
Lokii
Teratoma
Daddy Long Legs
Triachnid
Delirium
Delirium is able to transform into a handful of the bosses added in Fiend Folio if they were previously encountered in the run. They will even have unique skins when doing so.
The following bosses Delirium can transform into are:
Notes
- In the files, there is a Delirium skin for
Kingpin, though it seems to be unused.
Miscellaneous
Rune of Berkano
Rune of Berkano has received a small buff, as now it also spawns three Blue Skuzzes in addition to the 3
Blue Flies and
Blue Spiders.
Boom!
Added an explosion sound effect when picking up Boom!, a trait which has also been given to all other X10 items.
SMB Superfan
Changes the color of the body that is given to isaac when SMB Superfan is obtained to look more like the head.