Bob's Rotten Head

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Bob's   Rotten   Head
Item icon
Item altar
"Reusable ranged bomb"
Table dividing line 1.png
Item ID
5.100.42
Table dividing line 2.png
Recharge Time
Removed in Repentance3 rooms 3 rooms
Added in Repentance2 rooms 2 rooms
Table dividing line 3.png
Collection Grid
Removed in Afterbirth(page 1, column 2, row 5)
Added in Afterbirth(page 1, column 2, row 3)

Bob's Rotten Head is an activated item.

Effects[edit | edit source]

  • Upon use, Isaac holds a poison bomb which can be thrown in the cardinal directions and explodes on impact.
    • Removed in Repentance The explosion deals a flat 50 + Isaac's tear damage and poisons affected enemies.
    • Removed in Afterbirth The poison deals 6 or 8 points of damage over time.
    • Added in Afterbirth / Removed in Repentance The poison deals 3 times Isaac's tear damage over time.
    • Added in Repentance The explosion deals a flat 185 + Isaac's tear damage and leaves behind a gas cloud that poisons affected enemies. The Poison cloud deals 5 damage.
  • Added in Afterbirth This item belongs to the Bob set. Collecting three items from this set will transform Isaac into Bob.

Notes[edit | edit source]

  • Bob's Rotten Head is affected by many tear modifiers and some bomb modifiers. Notable exceptions and precautions are listed below.
  • Bob's Rotten Head cannot directly impact Beggars, Slot Machines or Blood Donation Machines, just passing through, but can destroy them with the blast damage if it impacts anything nearby and open Secret Rooms, Super Secret Rooms or destroy rocks like any other bomb.

Interactions[edit | edit source]

  • Added in AfterbirthBob's Bladder Bob's Bladder / 15►Bob's Curse Bob's Curse / 15►Bobby-Bomb Bobby-Bomb / Added in Afterbirth15►Bomber Boy Bomber Boy / Added in Afterbirth †15►Fast Bombs Fast Bombs / Added in Afterbirth15►Scatter Bombs Scatter Bombs / 15►Mr. Mega Mr. Mega: No effect.
  • Added in Afterbirth15►Car Battery Car Battery: No effect.
  • Added in Afterbirth15►Continuum Continuum: Bob's Rotten Head can now travel through walls and appear out of the opposite wall, similar to a portal-type mechanic.
  • Removed in Repentance 15►Cricket's Body Cricket's Body/15►The Parasite The Parasite: no longer travels through the wall, instead he bounces off it, like with Rubber Cement and then travels for the rest of it duration and then explodes.
    • Added in RepentanceCauses to smaller tears to appear and then explode. Tears do not look like the normal head.
  • Removed in Repentance Added in Afterbirth15►Explosivo Explosivo / Added in Afterbirth15►Sticky Bombs Sticky Bombs: If Bob's Rotten Head sticks to an enemy (sometimes with Explosivo, always with Sticky Bombs), the explosion is delayed but will deal 110 damage.
    • Added in Repentance No longer sticks to enemies.

In-game Footage[edit | edit source]

Unlockable Achievements[edit | edit source]

Gallery[edit | edit source]

Trivia[edit | edit source]

  • The item's appearance is similar to Pestilence's head.

Seeds[edit | edit source]

PC Normal mode only 6DKD WJZG (Treasure Room adjacent to spawn)

PC Normal mode only A7ZJ BFRD (Treasure Room adjacent to spawn)

Vita Y8JW A17S

Bugs[edit | edit source]

Bug Bug! Although Bob's Rotten Head works normally with Butt Bombs and Bomber Boy has no effect, their combination drops the explosion damage by 50%.
Bug Bug! Using Bob's Rotten Head with Trisagion leads to an instant explosion that hurts the player.


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