Antibirth adds a few new types of pickups.
Hearts
Immortal Heart
Immortal Hearts are white hearts which append to the end of the health bar like soul hearts.
Immortal Hearts always take two hits to be fully depleted, and will regenerate from half to full upon clearing a room.
Immortal Hearts replace Eternal Hearts with a 50% chance and do not spawn in any other way, except for one room in the Corpse.
Rotten Heart
Rotten Hearts are infested red hearts which fill up a full heart container. If a Rotten Heart is picked up at full health, it will replace the rightmost red heart.
For each Rotten Heart possessed upon clearing a room, two blue flies will spawn. You cannot have half a Rotten Heart; they are always depleted in one hit.
Depleting a Rotten Heart will not count against Devil Deal Chance when it's the rightmost red heart.
Rotten Hearts are unlocked by entering the Corpse for the first time.
Notes
- Although a Rotten Heart is depleted in one hit, under certain circumstances Isaac can have half a rotten heart. After Isaac starts taking a full heart of damage from enemies, if Isaac takes damage with a Rotten Heart next to half a red heart, half of the rotten heart will be depleted instead of being destroyed fully.
- A half Rotten Heart looks identical to a half Red Heart, but it also spawns two blue flies. Grabbing half of a regular red heart will "repair" it. Taking half a heart of damage will deduct half a heart of Isaac's health; however, taking a full heart of damage will deduct 1.5 red hearts.
Pills
Three new pill effects were introduced in Antibirth.
Pill | Effect |
Experimental Pill | Increases one random attribute and decreases a different random attribute. Will not decrease attributes with PHD. |
Shot Speed Down | Decreases shot speed. |
Shot Speed Up | Increases shot speed. |
Notes
- It is possible for an Experimental Pill to decrease health while Isaac has one heart container, killing him.
Runes
Multiple new runes were added to Antibirth. When on the ground, these runes look like:
Rune | ID | Icon | Message | Unlocked by completing | Effect |
---|---|---|---|---|---|
Rune of Gebo | 60 | "Charity" | 4x. Bloody Mary | Donates to a machine or beggar | |
Rune of Kenaz | 61 | "Pestilence" | 2x. Scat Man | Poisons all enemies in the room | |
Rune of Fehu | 62 | "Wealth" | 3x. Turbo | Turns all the pickups in the room into coins | |
Rune of Othala | 63 | "Legacy" | 9x. Seeing Double | Rewards a random item that Isaac already holds | |
Rune of Ingwaz | 64 | "Treasure" | |||
Rune of Sowilo | 65 | "Renewal" |
Bosses | Challenges | Chapters | Characters | Items |
Monsters | Objects | Pickups | Trinkets | Unlockables |