IsaacHDXxx form2Isaac RebirthKeeper sprite

A smiling stereotypical bomb.


Isaac drops a bomb with larger than normal explosion radius.

Mr. Boom

Larger than normal explosion radius.


  • Bobby-Bomb - Causes Mr. Boom to home in on enemies.
  • Bob's Curse - Poison effect also applies to bombs dropped by Mr. Boom.



  • Placing Mr. Boom in a room, leaving, and returning to the room will cause Mr. Boom to turn into a normal bomb, but with the same increased blast radius.

Start a Discussion Discussions about Mr. Boom

  • Mr. Boom's refill

    4 messages
    • Boy, that escalated quickly. But good to know ^.^
    • It's a bug that has been patched, I think But yeah if you still play an old version you can play infinite bombs, I always did that. And died

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