Blue Baby
| Id | 30 |
| Information | Blue Baby is a Co-op Baby in The Binding of Isaac. |
| Description | Spawns with an extra  Soul Heart. |
| Unlock | Defeat Mega Satan as  ???. |
| History | This baby was added in Afterbirth. |
| Id | 30 |
| Information | Blue Baby is a Co-op Baby in The Binding of Isaac. |
| Description | Spawns with an extra Soul Heart. |
| Unlock | Defeat Mega Satan as ???. |
| History | This baby was added in Afterbirth. |