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Unofficial fan project. Not affiliated with the developers of The Binding of Isaac.

Game facts are sourced from the Binding of Isaac Rebirth Wiki (CC BY-SA), and each guide links to its sources. Your progress is saved only in this browser.

Character

Apollyon

Tainted version: Tainted Apollyon

Unlocking Apollyon

Achievement “Apollyon” #340

Defeat Mega Satan.

Completion marks

0 of 12 marks · 0 on Hard / Greedier. Click a mark to change it.

A Hard win counts as Normal too.

Sources:Completion Marks Hard mode Greed Mode

What the marks unlock

Heart (Hard)SmelterUnlocked a new item.
IsaacLocust of WrathUnlocked a new item.
SatanLocust of PestilenceUnlocked a new item.
???Locust of FamineUnlocked a new item.
LambLocust of DeathUnlocked a new item.
Mega SatanMort BabyUnlocked a new co-player baby.
Boss RushLocust of ConquestUnlocked a new item.
HushHushyUnlocked a new item.
GreedBrown NuggetUnlocked a new item.
Greed (Greedier)Black RuneUnlocked a new item.
DeliriumVoidUnlocked a new item.
MotherLil PortalComplete the Corpse with Apollyon.
BeastWorm FriendComplete the final chapter with Apollyon.

Unlocked by playing as Apollyon

Tainted ApollyonOpen the hidden closet in Home as Apollyon.
Apollyon BabyEarn every completion mark on Hard mode as Apollyon.