The Binding of Isaac Final Expansion: the final expansion for The Binding of Isaac: Rebirth has been released The Binding of Isaac: Repentance was first announced in 2018, from December 2020 to this There was a delay of several months until March, slowly approaching release.

And now players have returned en masse to this roguelike: The Binding of Isaac: The Binding of Isaac: Rebirth recently broke the Steam record for concurrent play set in October 2015.

And there may be another reason for players to stick around for a while: after Repentance's release, modders have explored the game's code and found traces of a native online co-op mode, which also works with up to four players.

Online co-op was already possible via Steam's Remote Play Together feature or via Parsec, both of which caused latency and bandwidth issues depending on Internet speeds. Native co-op in The Binding of Isaac is a very Many players are hoping that the recently discovered code may hint at an official co-op update in the future, but no official announcement has been made.

Reports from players who have tried the native co-op mode are mixed. Some report crashes, disconnections, or that the mode does not work at all. Others have found that it worked better than remote play.

If you'd like to try it yourself, here's a brief instructional video.