Crooked Penny

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Item icon
Item altar
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(page 4, column 20, row 6)

Crooked Penny Defeat Delirium as Keeper
Added in Afterbirth †

Crooked Penny is an unlockable activated item added in The Binding of Isaac: Afterbirth †.

Effect[edit | edit source]

  • Upon use, has a 50% chance to double all items, pickups, and chests in the current room.
    • If the effect fails, the items, pickups, and chests disappear, and a penny is spawned.

Notes[edit | edit source]

  • If used in a Shop or Devil Room, the duplicated items and pickups can be taken for free.
  • If the effect fails in a shop that contains a Restock Machine then the Restock Machine can be used to refresh the Shop, bringing back new items and pickups.
  • If used in the Boss Rush room, it can duplicate the items, and all of them can be taken without affecting the originals. Successfully duplicating the items will trigger Boss Rush, and failing to duplicate them will not.
  • If used on The Polaroid The Polaroid and The Negative The Negative after defeating Mom, it can duplicate them, and they can both be taken without affecting the originals.
  • The 50% chance is predetermined after each use of Crooked Penny. By force quitting after each failure, this can be exploited to generate large numbers of copies of useful items - if the penny is going to fail, then use it in a different room, recharge it, and try again.

Synergies[edit | edit source]

See Diplopia#Synergies for info about stacking duplicate items.

Interactions[edit | edit source]

  • Car Battery Car Battery: Activates the item twice, quadrupling all items/drops in the room at a 25% chance. However, if the first activation fails, and the second activation succeeds, a copy of the item will be created as the original disappears, and the new copy will have no cost if it were in a Shop or Devil Room. This has a 25% chance as well, leaving the overall failure chance at 50% (a success followed by a fail will have the same effect as two fails).

In-Game Footage[edit | edit source]

Trivia[edit | edit source]

  • This item's effect, if the coin flip succeeds, is almost identical to Diplopia Diplopia's.
  • Before the first Booster Pack, it could be used on empty item pedestals to cause another item to appear.

Keeper Unlocks Keeper Unlocks Keeper Unlocks
Keeper now holds... A Penny!Rib of GreedNoose BabyKeeper holds Wooden NickelKeeper holds Store KeyDeep PocketsKarmaSticky NickelsSuper Greed BabySale Baby Crooked PennyEye of Greed
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