View table: bug

Using ? Card on Gello will still result in the charges being used once Gello is whipped out. The ? Card will be used up as well, despite providing no free use of the item.

Attempting to open the door leading to Hush's room while holding a Golden Key will cause Isaac to walk through the door without opening it, immediately beginning the Hush fight.

PS4 Mama Mega! cannot be used to open the door to ???.

With 9 Volt and The Battery, the gradual charge of 4.5 Volt is separate from 9 Volt's charge on one-charge items rather than being additive.

Each use of Glowing Hourglass that does not move Isaac to a different room from the one he is currently in (such as by teleporting to the previous room then using it again) will duplicate the locusts.

In Greed Mode, if Isaac picks upA Lump of Coal in a Silver Treasure Room and then fights Krampus,A Lump of Coal may still drop after the fight. Since this item's effect does not stack with itself, this will give Isaac a useless item.

If Keeper picks up Abaddon, it will remove all of his Coin Hearts but will not kill him until he picks up an item.
This still applies if Abaddon is acquired via the Debug Console, but not if the item is picked up normally.

According to locusts.xml, Ipecac locusts are supposed to explode. This never happens in game; Ipecac only gives a locust that deals slightly more damage and poisons enemies.

Each use of Glowing Hourglass that does not move Isaac to a different room than the one he is currently in (such as the starting room of a new floor) will duplicate the locusts.

Clear Rune must be unlocked and collected to attain !Platinum God! and The Real Platinum God despite being a Repentance item. This is due to its ID being unused in Rebirth, thus being in the ID range of Rebirth items.

PS4 If installed, before unlocking it, the 'Challenges' trophy will require completing all the challenges available on the current DLC played instead of the original 20 Challenges.?'"`UNIQ--ref-00000000-QINU`"'?

Picking up Bone Hearts while at 12 hearts removes charges from the Box.

Both the eight-directional firing (using buttons) and the full analog aiming (using the analog stick) are unavaliable in any controller mode.

Delirium can transform into Fallen Uriel and Fallen Gabriel but they do not have unique Delirium skins.

The Found HUD will incorrectly display the angel room chance as 100% if either of the "Blessed" messages appear. The percentages listed in this page are however correct.

If Anima Sola is used on segmented enemies (such as Larry Jr.) and targets one of the middle segments, the enemy will sometimes be split into two after the chains break.

Using an "I've found pills" pill will turn Apollyon's head invisible, showing only his face and horns.

Converting a heart by buying it will not consume any money. However, Isaac must have the amount of coins needed to purchase the heart.

Dropping a trinket in the exact same spot as an obstacle may despawn Cracked Key further down the road during Ascension.?'"`UNIQ--ref-00000003-QINU`"'?

If an Imp is stunned, feared, or shrunken, it will still attack Isaac while running away from him.

If a Baby, Angelic Baby or Imp tries to shoot Isaac at the same time as it teleports, their shots will be fired without their corresponding animation.

Concussive effects don't work on Baby Plum.

If Isaac is teleported into the I AM ERROR room on the final floor of the challenge, there will be no exit, making the run impossible to beat.

Sometimes the layout of the rooms makes traversing to the previous floor impossible. There might be a hole where the light is supposed to be and without flying, makes the run impossible to beat.

In the Cantripped! challenge, using a Bag of Crafting will crash the game.

While being controlled by mouse, having both The Ludovico Technique + Pop! will mess up the direction control of Bag of Crafting.

If a Golden Battery appears in the Abandoned Area before the Mother's Shadow chase, it will despawn for the floor, as the room configuration is changed when the chase begins.

BBF can get stuck in corners in The Beast fight.

BBF sometimes does contact damage to certain enemies without exploding. ^{[Check ingame]}

If you use The Poop on the middle of the carpet and blow it up with a bomb, the trapdoor will not appear.

Touching a Battery Bum while it is giving Isaac's active item a charge will grant another charge. Multiple additional charges can be gained this way.

Will not pay out correctly when trying to gain charges as Bethany.

Gurgles, Splashers, Boils, Guts, and Sacks are immune to Best Friend's explosion.

Doubles when Multidimensional Baby passes through it.^{[citation needed]}

The Visage's mask is not included in the Bestiary (only the Heart is), while both of Mask of Infamy's halves are included.

The Bestiary counts every time Delirium changes forms as separate encounters.

The Sin Collector achievement can be obtained without a full Bestiary. It requires 2 entries less than what is actually featured.

If The Boomerang is thrown to one of Big Horn's hands, the hand will display Big Horn's death animation and play the music after a boss is defeated, but Big Horn will still be alive

Playing as Keeper, having more than 3 HP, and entering the area in which Knife Piece 2 can be acquired will remove the fourth HP (can be increased back to 4 HP after)

Playing as Magdalene, having more than 12 hearts, and entering the area in which Knife Piece 2 can be acquired will completely remove all hearts above 12.

Falling into a Pitfall while the Black Hole is active will result in Isaac becoming headless, immobile and invulnerable, softlocking the run until it is quit and resumed.

Creating and entering a trapdoor which also leads to a Black Market (for example by We Need To Go Deeper! or an Rune of Ehwaz rune) results in not being able to escape the Black Market other than going to the next floor.

Using Telepills or Undefined to enter a black market in the mirrored world on Downpour II and Dross II will generate a black market with no items and no exits. Without any other means of teleporting, this will softlock a run.

Blanket doesn't work in Dogma and The Beast boss fights.

Blastocyst will briefly appear as the largest form before splitting into smaller ones, regardless of which form was killed.

The D10 can reroll the Suture half of Blighted Ovum

Upon coming back from obtaining Knife Piece 2 or after defeating the Lamb and refusing a victory lap, the stat boost obtained from this item at the beginning of the floor will be gone.

Using Glowing Hourglass to return to the previous floor twice will cause Blood Oath to activate an extra time, giving buffs corresponding to drained HP.

Opening a locked door without entering it and then leaving and re-entering the room will no longer cause the door opened by Blue Key to lead to a Blue Womb room. In other words, this removes the downside of the trinket.

Although Bob's Rotten Head works normally with Butt Bombs and Bomber Boy has no effect with it, their combination drops the explosion damage by 50%.

Due to the extreme force of multiple simultaneous explosions, it is possible for Bomber Boy bombs (especially when combined with Mr. Mega) to propel Isaac into obstacles or over pits.

Although Bob's Rotten Head works normally with Butt Bombs, and Bomber Boy has no effect with it, their combination drops the explosion damage by 50%.

If switching between Tainted Lazarus and Dead Tainted Lazarus with the Flip item, there is a chance to spawn a mass amount of bone spurs on the place you flip each time you use the item.

If sufficiently many bone orbitals are created, other familiars may disappear. Collecting a new familiar or resuming the run will restore the missing familiars.

As Tainted Isaac, dropping and picking up the uncombined Book of Virtues will refresh the item's charge, allowing for max wisps.

Using a Dice Room or being hit as Tainted Eden to reroll an uncombined Book of Virtues will result in it rerolling into a different passive item while still remaining in the active item slot. It will disappear when Isaac picks up a different active item.

Entering Boss Rush after the 20 minutes (killing Mom before it, but waiting to enter) and using Glowing Hourglass will crash the game.

It is possible for item pedestals to spawn on red poop (which can be spawned by Carrion Queen or red Dingle) or spikes. Attempting to pick up the item will damage Isaac.

One of the possible layouts for the Boss Rush room will have spikes near the location that an item pedestal spawns after completing the fight. If you possess There's Options, one of the item pedestals can appear in the same place as the spikes, causing you to take damage by picking that item up.

PS4 Mama Mega! cannot be used to open the door to Boss Rush.

This item does not work with Broken Remote.

Replacing this item with another active item, switching into another active item with Schoolbag, or directly removing it via debug console while holding the active item key causes Isaac to take damage, even if the charge bar isn't depleted at all.

Picking up Brimstone before picking up Scorpio will not change the beam's color. Picking up Scorpio before Brimstone, however, will properly change it to green.

When having Brimstone + My Reflection and facing towards an east/west wall, standing directly in front of it will make Isaac shoot in reverse — the front-facing oval Brimstone beam will shoot from the back, and the back-facing beam will shoot from the front.

Brimstone will occasionally fire the laser the opposite direction.

Taking second part of Mom's Shovel on different Tainted Lazarus form won't assemble the shovel.

Rarely, Brownie will slide around the room incredibly quickly, resulting in unavoidable damage.

The familiar will change upon exiting the Knife Piece 2 area.

If hit by an explosion before finishing collection on the room, Bum Friend may freeze in place.

Bumbo's level can be reset after the sequence of obtaining Knife Piece 2 in Ashpit/Mines II.

Collision between Bumbo and other bum familiars such as Dark Bum can prevent them from collecting pickups if you're holding one of the firing buttons upon entering a room

Spider enemies that are neutralized by Bursting Sack cannot be poisoned by contact via The Virus, Serpent's Kiss, or turned into gold via Midas' Touch. They also become immune to contact damage from My Little Unicorn, The Gamekid, and The Nail, but not the damage from Midas' Touch or Little Horn.

Although Bob's Rotten Head works normally with Butt Bombs, and Bomber Boy has no effect with it, their combination drops the explosion damage by 50%.

In trap rooms with retracting spikes, pressing the plate within five frames of the spikes deploying will cause them to appear to fail to retract, but this is only a visual bug, and they will not deal damage. This can be fixed by leaving the room and re-entering.

Tainted ??? does not have a costume assigned for C Section (despite ??? having one), and nonetheless always appears to be walking while charging a shot, even when stationary (see previous bug).

There's no idle animation for C Section's costume, so Isaac (and every other character other than Lilith) will always appear to be walking when charging a shot, even when stationary.

While Isaac has both C Section and Incubus (including Lilith's inherent Incubus), Incubus' flying animation does not play while not firing; it floats around with no animation at all. The animation plays normally while firing.

Using the Emergency Contact on C.H.A.D. then killing him while he is held will crash the game.

Killing C.H.A.D. for the first time using Tainted Lost will not unlock Little C.H.A.D.

Cain's covered eye can be seen through the reflection on the floor on stages/rooms with water.

Shooting with mouse control enabled will not break the camouflage effect, permanently causing confusion effect on enemies, but without granting the stat bonuses.

Triggering Dark Arts while Camo Undies are still active will deactivate Camo Undies for the duration of Dark Arts, after which Camo Undies will reactivate.

Receiving the Bag of Crafting as a card and using it will crash the game.

Mr. ME!: Grabbed items and pickups may become ghostly and impossible to pick up. Leaving the room and returning fixes this.

Entering one of the portals causes the Found Soul familiar to become invisible until Isaac drops and picks up the trinket again or enters a new floor.

In the first floor of a Victory Lap, the portals will appear but cannot be entered. It will work again from floor 2.

Portals may on rare occasion appear in Death Certificate rooms, even under item pedestals. Taking the portal will simply teleport Isaac to another room inside the Death Certificate area.

Using a portal, then rewinding time with the Glowing Hourglass will not cause the portals to reappear.

Rune of Hagalaz will open Secret Room doors in L-shaped rooms.

As Tainted Lazarus, all effects of XIX - The Sun? except bone heart conversion and sprite change will disappear when flipping.