Monsters

Monsters refers to the many antagonistic creatures and entities the player will encounter throughout the game.

Most monsters (with few exceptions) will damage Isaac by either touching him or shooting him with projectiles. Less frequently, monsters will spawn additional, lesser monsters, spread creep, or attempt to affect the player's movement. Along with the more common variety of monsters, champion versions can be found lurking about; These monsters are often like their common counterparts, but have a color tint or size change, more health, and drop basic pickups on death. There are also champion versions of most bosses.

There are 196 naturally spawning monsters in total. 40 of them were added in Afterbirth and 21 were added in Afterbirth † (13 were added in Booster Packs). Almost all of these naturally spawning entities are featured in the Bestiary.

Monster List

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Champions
Some monsters can spawn as a Champion which deviates in coloration and size. The champion's coloration/size denotes which peculiar behaviors and traits it will exhibit. Champions will generally drop a pickup (coinciding with the color of the champion) when killed on normal difficulty. However, in hard mode, the drop rate is reduced to 33%, while in Greed Mode, champions won't drop pickups at all.

Most champions have a visual 15% size increase, inflict full heart damage regardless of chapter, and have double the health of a normal monster. Champions are generally regarded as more dangerous than common monsters.

Champions always deal contact damage, regardless of what monster they are (e.g. a common Mulligan will not deal contact damage, but champion versions will).

The identifying scheme for champion qualities is as follows:

The chances for Champion monsters to appear are noted in the table below:


 * adds 15% to the base champion chance. This has no effect in.
 * Purple Heart doubles the champion chance, and stacks with Champion's Belt.
 * changes Purple Heart to quadruple the chances instead of doubling.

Monster Replacements
Some monsters have a chance to be replaced with other monsters when they spawn, but only at room entry. Some replacements only occur on certain floors.

(Disclaimer: Chances are approximate!)