The Binding of Isaac: Rebirth hits an all-time Steam peak 12 years after launch

The Binding of Isaac: Rebirth just hit its highest-ever concurrent player count on Steam — nearly 131,000 players at peak, more than doubling its previous record of 70,701 set back in April 2021. The game is currently the 10th most-played title on Steam, sitting above Path of Exile 2 and Slay the Spire 2.

The catalyst is a historic Steam Summer Sale discount: Rebirth is 90% off, making it the cheapest the game and its DLCs have ever been on the platform. PC Gamer clocked the peak at 123,429, while SteamDB data cited by Eurogamer puts it closer to 131k — either way, player count is up 394.9% over the last 30 days. The base game is currently $1.49 on Steam, which is, absurdly, cheaper than the original Flash version.

Rebirth launched in 2014 as a full remake of Edmund McMillen's 2011 Flash original, and has grown steadily ever since through expansions Afterbirth (2015), Afterbirth+ (2017), and the sequel-sized Repentance (2021). The free Repentance+ DLC arrived in 2024 and finally added online co-op — something fans had wanted for years. That the game is now outpacing newer roguelikes in concurrent players says a lot about how deep its content well runs. McMillen's latest game, Mewgenics, peaked at around 115,000 concurrent players earlier this year; Isaac just cleared that bar.

Looking ahead, The Binding of Isaac: Repentance+ is getting a physical Nintendo Switch 2 release in Q3 2026. For now, the sale is still live — at $1.49, it's hard to argue against jumping in if you somehow haven't already.