The Binding of Isaac Was Just a Warm-Up for the Big Mewgenics Project: A Developer’s Revelation

The Binding of Isaac became one of the most acclaimed roguelike games, and its creator, Edmund McMillen, recently revealed that the project started as a warm-up for a far larger venture — Mewgenics.

In 2010, after the release of Super Meat Boy, McMillen and Tommy Refenes’ team began planning a new title. Mew-Genics was announced in 2012, but development was paused two years later and McMillen left Team Meat. He returned to Mewgenics in 2018, effectively restarting development alongside Tyler Glaiel.

McMillen didn’t waste time: together with Florian Himsl he released The Binding of Isaac in 2011, a game that was originally intended merely as practice for the future project.

After Super Meat Boy, McMillen and Refenes set out to create their own roguelike. They drew inspiration from Spelunky and felt the genre still had untapped potential. While Refenes was on vacation, McMillen decided to make a small project to gain experience, and The Binding of Isaac was completed in three months.

They later returned to Mewgenics, but the project was cancelled. The Binding of Isaac: Rebirth, meanwhile, grew steadily into a large and popular game.

Notably, Mewgenics — which McMillen regards as his flagship project — now has a confirmed release date: February 10, 2026 on PC.

Source: iXBT.games