GB Bug

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GB   Bug
Item icon
Item altar
"Double tap glitch"
Table dividing line 1.png
Item ID
5.100.405
Table dividing line 2.png
Table dividing line 3.png
Collection Grid
Added in Afterbirth † / Removed in Repentance(page 4, column 20, row 2)
Removed in Afterbirth †(page 4, column 20, row 2)
Added in Repentance(page 4, column 1, row 3)
Unlock Method
GB Bug Defeat Ultra Greed as Eden
Added in Afterbirth

GB Bug is an unlockable passive item added in The Binding of Isaac: Afterbirth.

Effects[edit | edit source]

  • Removed in Repentance Spawns a familiar that bounces diagonally around the room, deals 8 damage per tick or 120 damage per second and applies a random status effect to enemies it comes in contact with. The familiar also has a chance to re-roll pickups that it passes over into other pickups, chests, or items, in an uncleared room only (with at least one enemy alive).
  • Added in Repentance Spawns a familiar that follows Isaac. Double tapping the fire button launches it forward, causing it to reroll the first monster or pickup it hits. It respawns after clearing a room.
    • If it cannot reroll an enemy (e.g. a boss), it will deal some damage instead.

Notes[edit | edit source]

  • Removed in Repentance GB Bug can block projectiles.
  • Removed in Repentance GB Bug does more damage per second than 15►The Peeper The Peeper, with the added random status chance.
  • Added in Repentance GB Bug is able to reroll Throwable Bombs into normal consumables. After doing so, the corresponding Bomb Grimace will generate another Throwable Bomb, making it able to generate a potentially large amount of free consumables.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Before Repentance, GB Bug's pickup quote was "Game breaking bug, right away!"
  • This item's in-game appearance may be a reference to "Missingno.", a famous bug occurring in the first Pokémon games.
  • As Edmund confirmed on Twitter the pickup quote "Game breaking bug, right away!" is a reference to a quote by Phil Fish in Indie Game: The Movie, where he says the same words when a bug is discovered in FEZ on the first day it is being shown at PAX.

Seeds[edit | edit source]

PC Removed in Afterbirth † Hard mode only 9B7E 3G67 (Treasure Room adjacent to spawn, curse of the labyrinth)

PC Removed in Afterbirth † Normal mode only GZWT H4LE (First floor Treasure Room)

PC Removed in Repentance Normal and hard modes only 44W2 XHJ8 (Treasure Room adjacent to spawn)

PC Added in Repentance Normal and hard modes only OCML SLQN (First floor Treasure Room)


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