The Binding of Isaac: Rebirth Blows Past Its Old Steam Peak, Tops 156,000 Concurrent Players

More than a decade after its debut, The Binding of Isaac: Rebirth is posting the biggest concurrent-player numbers of its life on Steam. Edmund McMillen's roguelike remake pulled in over 156,000 concurrent players in the 24 hours leading into July 7, 2026, according to Kotaku — more than double any concurrent-player mark the game has ever hit. The spike caps a steady climb over the past week and a half, and it's pushing Rebirth ahead of several much newer live-service and blockbuster titles on Steam's concurrent-player charts.

A record more than a decade in the making

Rebirth launched in 2014 as a full remake of McMillen's original 2011 Flash game, published by Nicalis. Its previous concurrent-player ceilings were modest by comparison: around 69,000 at launch in 2014, and roughly 70,000 during a resurgence in 2021. This week's numbers don't just edge past those marks — they roughly double them. The climb has been building steadily rather than appearing overnight. Kotaku's reporting shows the game crossing 109,000 concurrent players on June 27, jumping to 130,000 by June 29, then 153,000-plus on July 5, before topping out above 156,000 as of July 7.

Why now: a steep discount and a McMillen halo effect

Two forces appear to be driving the surge. The first is price. Rebirth is part of the ongoing Steam Summer Sale, which runs from June 25 through July 9, 2026, and the game has been cut from $15 to $1.50 — a 90% discount. A bundle that includes all of its DLC has similarly dropped from $50 to $5, making it one of the more aggressive markdowns of the sale for a title with this much staying power. The second factor is spillover attention from Mewgenics, McMillen's newer game co-created with Tyler Glaiel. Mewgenics drew around 115,000 players of its own in February 2026, and that renewed spotlight on McMillen's work seems to be sending players back toward his best-known release.

Outpacing bigger names

The scale of the surge stands out most in context. At its current concurrent numbers, Rebirth is outperforming Warframe, Grand Theft Auto V, and Delta Force on Steam's concurrent-player rankings — an unusual position for a 2014 indie roguelike to occupy against a live-service mainstay, one of the best-selling games of all time, and a modern shooter. With the Steam Summer Sale running through July 9, Rebirth's discount-driven bump could taper off once full pricing returns. Whether the game holds on to a meaningfully larger player base afterward — as it did to a smaller degree following its 2021 resurgence — remains an open question, but for now it's proof that a well-regarded roguelike can still out-draw the platform's biggest names when the price is right.