Mewgenics, the new release from Edmund McMillen and Tyler Glaiel, the indie devs behind hit roguelike The Binding of Isaac and all its subsequent expansions, smashed through 250,000 copies sold in just 12 hours.

In a tweet posted by Glaiel, he screenshotted a post from 2023 where he explained it would need to sell that much for him to “consider Mewgenics a success.” Shortly before, IGN reported the game sold over 150,000 copies in six hours, and that McMillen’s previous sales record came with The Binding of Isaac: Rebirth, at 40,000 in one day.

This came just a few hours after he revealed the team “made back their development budget after three hours,” which given the game was first announced in 2012, is a huge accomplishment. That’s a whopping 14 years, although it was put on hold in 2014, canceled in 2016, then picked back up again two years later.

To celebrate, Glaiel posted a picture of both him and McMillen with a cat-shaped cake, while they each hold replica awards and wear gold medals. At the time of writing, Mewgenics peaked with a player count just a few shy of 66,000 on Steam, and it was the top-selling game on the platform yesterday.

It’s also been received to critical acclaim, with a Metacritic score of 89 from 38 reviews. Polygon’s Mewgenics review describes it as “a charmingly churlish game” that “players could likely get years of entertainment from,” along with considering it “the first GOTY contender” for 2026.