Mega Blast

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Removed in Afterbirth †Item icon
Added in Afterbirth †Item icon
Item altar
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Character appearance
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12 rooms 12 rooms
Devil Room Devil Room
Greed mode only Devil Room Devil Room
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Added in Afterbirth †(page 4, column 16, row 4)
Removed in Afterbirth †(page 4, column 16, row 4)
Mega Defeat Mega Satan as every character
Added in Afterbirth

Mega Blast is a secret unlockable activated item added in The Binding of Isaac: Afterbirth.

Effects[edit | edit source]

  • Upon use, Isaac fires a giant, incredibly powerful blood laser, similar to the one used by Mega Satan, for 15 seconds.
    • The beam deals Isaac's current damage multiplied by 5 per tick.
    • The beam has enough power to push Isaac backward while being fired and will last between rooms, and across multiple floors.
    • The beam has spectral and piercing effects.
    • The beam can be moved while firing in many angles diagonally.
    • While Mega Blast is being fired, Isaac cannot:
    • The laser extinguishes fires, detonates TNT, and destroys poop.

Notes[edit | edit source]

  • Picking up a Little Battery with this item will not fully charge it. Instead, it will add 3 to its charge, meaning that 4 batteries are required to fully recharge the item.
  • Using a 48 Hour Energy pill with this item will fully charge it.
  • Mega Blast has an 80% decreased item pool weight, making it less likely to appear than other collectibles.
  • To unlock Mega Blast, Mega Satan must be defeated with all characters including secret characters (The Lost and Keeper).

Synergies[edit | edit source]

  • All synergies and interactions pertaining to Brimstone Brimstone, as linked here, pertain to Mega Blast, with the following exceptions:
  • Polyphemus Polyphemus: Quadruples beam's damage.
  • Added in Afterbirth †Schoolbag Schoolbag: Beam will continue to fire when switching to another active item. Other active items can be used while the beam is firing.

Interactions[edit | edit source]

  • Added in Afterbirth †Angelic Prism Angelic Prism: Laser beam will only split and change color when Isaac is directly against a wall.
  • Godhead Godhead: Multiplies beam damage by 1.2, retains homing effect. The beam does not have a damaging aura.
  • Incubus Incubus: Familiar fires normal tears while Mega Blast is in use.
  • Soy Milk Soy Milk: Reduces beam's damage to Isaac's base damage.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Mega Blast's collectible sprite is called 'Mega Satan's Breath' in the game files, which may be its initial name.

Bugs[edit | edit source]

Bug Bug! If the player continues a run that was exited while Mega Blast was active, Isaac will retain the costume and animation of Mega Blast until the item is used again, but no beam will appear.

Seeds[edit | edit source]

 PC  WCB1 YZ39 (First floor Devil Room)

 PC  Normal and hard modes only TQWA 6TQD (Curse room adjacent to spawn, chest teleports to devil deal)

 PC  3KY4 LSVL (Second floor Devil Room)

 PC  RZL2 6MQ0 (Starting item as Eden, and will also start with Godhead Godhead)

 PC  Added in Afterbirth † S3VX RPWZ (Starting item as Eden)

 PS4  Added in Afterbirth † XGYR 11TV (Starting item as Eden)

 PC  Hard mode only L6B9 ZZ22 (Starting item as Eden)

 PC  Hard mode only NZ7T 4RAJ (Starting item as Eden)

 PC  Greed mode only W3BZ BBB2 (Starting item as Eden)

 PC  Greed mode only PGH7 BMRT (Starting item as Eden)

 Switch  Hard mode only PLXX XCLR (Starting item as Eden)

Gallery[edit | edit source]

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