Transformation items belong to one particular thematic set of collectibles with a special functionality:
Once Isaac collects three or more from one set, he will undergo a transformation that corresponds with the items' theme.
This category has the following 14 subcategories, out of 14 total.
- ► Conjoined items (20 P)
- ► Fun Guy items (10 P)
- ► Guppy items (7 P)
- ► Leviathan items (9 P)
- ► Oh Crap items (9 P)
- ► Yes Mother? items (18 P)