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Added in Afterbirth †

Adrenaline is a passive item added in The Binding of Isaac: Afterbirth †.

Effects[edit | edit source]

  • Gives Isaac a flat damage up based on how many empty Heart containers he has.
    • Removed in Repentance The damage up given is 0.2 for each empty Red Heart container Isaac has.
    • Damage ups are only applied for every fully empty heart container.
    • Added in Repentance The damage up given is ((2 * MissingHearts) ^ 1.6) * 0.1, where MissingHearts is the total half red hearts of health missing.
  • This item belongs to the Spun set. Collecting three items from this set will transform Isaac into a buff berserker.

Notes[edit | edit source]

  • This item has no effect on characters that can't have any Red Heart containers.
  • This item affects both Keeper Keeper and Tainted Keeper Tainted Keeper; empty Coin Hearts increase damage.
  • As The Forgotten The Forgotten, empty Bone Hearts increase damage, but if the Bone Hearts are broken, the damage buff is taken away.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Before v1.06.0190, Adrenaline was named Adderline.
    • Despite having its name changed, Adrenaline's item sprite is named collectibles_493_adderline in the game files.
  • Adrenaline is a hormone produced by the body in situations of high stress that increases blood circulation, breathing, and other things in preparation for the natural flight or fight reflex.
  • Adrenaline causes characters to have an animation that makes them look like they are breathing rapidly. The more health they're missing, the more exaggerated the animation is.

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