|This article is about the changes of "The Binding of Isaac: Antibirth". For the main page, see Grimace.|
|Bomb Grimace |
In the boss fight against the Tuff Twins, a couple of Bomb Grimaces will be found around the room to provide free explosives to use to defeat the boss.
|Quake Grimace |
Quake Grimace is an alternate version of Grimace that periodically fires a rock wave in which ever direction it's facing. It does not stop, even if the room is cleared.
Great Gideon appears to be a large boss variant of a Quake Grimace.