The Binding of Isaac: Afterbirth † (Afterbirth Plus)

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About Afterbirth Plus

A second DLC was released on January 3rd 2017 for The Binding of Isaac: Rebirth named 'Afterbirth+' or 'Afterbirth Plus'. It's main focus was to give players modding tools as well as another huge content patch. The feature list includes:

In terms of modding tools, the following mod support is included in this DLC:

A new playable character (Apollyon)
69 new items, 29 new trinkets and 10+ new pickups
A new final chapter
A new final boss
62 new achievements
5 achievement 'challenges'
100s of new rooms!
New victory lap feature! (allows the game to continue when finished)
A bestiary showing you a lot of detail related to the enemies you encounter throughout the game
2 new transformations
Monthly content updates (game will be updated with community made mods)
4+ new bosses and a new alt forms for existing bosses!