Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

1up! is a passive item.


  • Grants an extra life.
    • On resurrection, the mushroom that follows Isaac will disappear and Isaac will respawn in the previous room with all his previous Red Heart containers at full health.
    • If Isaac has no Red Heart containers, he'll respawn with 1/2 Soul Heart instead.
  • The 1up! mushroom begins following Isaac like a familiar upon pickup, but doesn't do anything.
  • Added in Afterbirth This item belongs to the Fun Guy set. Collecting three items from this set will transform Isaac into a walking mushroom.


  • Resurrection items activate in a set order. 1up! is 2nd in this order after Added in RepentanceSoul of Lazarus Soul of Lazarus.
  • ??? ???/Tainted ??? Tainted ???/Tainted Bethany Tainted Bethany/Tainted Forgotten Tainted Forgotten will respawn with 3 soul hearts.
  • Added in Afterbirth † The Forgotten The Forgotten will respawn with 3 filled bone hearts (notably more than his starting HP) and The Soul The Soul with whatever soul and black hearts he had on death.
    • Dying as The Soul respawns him with a 1/2 soul heart and The Forgotten with whatever bone hearts he had on death.
  • Added in RepentanceDark Judas Dark Judas/Tainted Judas Tainted Judas will respawn with 2 black hearts.
  • It is possible to collect more than one 1up! items, resulting in multiple extra lives.

In-game Footage[]


PC LDPB D0QG (15►X-Ray Vision X-Ray Vision adjacent to spawn, first Secret Room to left from spawn, unless you have 15►Forget Me Now Forget Me Now unlocked)

PS4 PC Normal mode only CWSQ TNM8 (first Secret Room right from spawn)


  • This is a reference to the Mario franchise, where collecting a green mushroom would give you an extra life.

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