Mewgenics is the cat-breeding tactics roguelike that has been almost-released for ten years
If you have not been following indie game development carefully since around 2012, here is the short version. Mewgenics is a turn-based grid tactics game where you breed cats with mutations, train them in semi-roguelike runs, and send them to fight other cats in arena combat. It was originally announced by Edmund McMillen and Tommy Refenes at Team Meat right after Super Meat Boy launched, and at the time it looked like the lighter and weirder cousin of Binding of Isaac. Then Refenes pulled focus to Super Meat Boy Forever, McMillen left to focus on Isaac DLC, and Mewgenics quietly went into a deep coma.
It came back in 2019 when McMillen announced he was restarting the project with a new team and a fresh art direction at Nicalis. There were periodic dev streams, some art drops, a few tactics-grid prototypes shown off at PAX, and then more silence. By 2024 most of the people who had originally been excited about the game had basically written it off as a permanent vaporware curiosity, in the same bucket as Beyond Good and Evil 2 or whatever Star Citizen is currently calling itself.
Now we have, finally, a real platform commitment. Switch 2 and PS5. That is not a release date, but it is the closest thing to one this project has had in seven years.
Edmund McMillen confirmed Mewgenics is coming to Switch 2 and PS5 in late March 2026
I'd preorder a McMillen game blind because he ships polished things eventually
Here is my actual position on this announcement. I have been playing Edmund McMillen's games since the original Flash version of Binding of Isaac in 2011. I have put more hours into Isaac and its expansions than I want to admit on a website where my parents might read this. The man's track record on delivery is excellent. Every game he has personally finished and shipped, from Super Meat Boy to The End is Nigh to Isaac to The Legend of Bum-bo, has been polished, mechanically deep, and supported with substantial post-launch patches. The reason Mewgenics has been in development so long is not that McMillen does not finish games. It is that this specific design is genuinely hard, and he has the cash and freedom to take his time.
That matters when you are deciding whether to take a preorder seriously. There are indies who announce a project and then quietly evaporate, and there are indies who announce a project, take ten years, and then ship something that becomes a permanent reference point in the genre. McMillen is firmly in the second camp. Isaac itself was a Flash prototype that became one of the most influential roguelikes ever made, and the rebuild and DLC cycle for Isaac took similarly absurd amounts of time. The pattern is real.
So when McMillen says 'Mewgenics is coming to Switch 2 and PS5,' I read that as a real commercial commitment, not a wishlist tweet. He has shipping infrastructure, an established publisher relationship through Nicalis on Switch hardware, and a community that has been waiting since 2012 to give him money.
Nintendo Switch 2 Console
Hybrid handheld and docked console for the Switch 2 generation
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What Mewgenics actually is, mechanically, and why it took ten years
The pitch in one sentence: imagine Final Fantasy Tactics where the units are genetically mutated cats you breed and the meta-progression is roguelike. The grid combat layer is turn-based, with each cat having a small action pool and unique mutation-based abilities. Between matches, you breed your survivors to get new cats with combined or mutated traits, manage a litter that grows with you, and decide which cats to risk in increasingly dangerous arena fights. McMillen has shown enough footage over the years to make clear this is not a thin tactics game. It has the same density of weird interactions and emergent broken builds that Isaac is known for.
The reason this took ten years is that breeding mechanics are hard to balance against tactics combat. Either the breeding is shallow and the tactics carry the game (in which case why have breeding), or the breeding is deep and tactics combat collapses into 'whoever bred the strongest cat wins.' Threading that needle requires a lot of iteration, and the version McMillen showed in 2014 was clearly not landing. The current version, based on the streams from 2024 and 2025, looks like he finally cracked it, but I want to play it before declaring victory.
The other reason it took so long is that McMillen genuinely does not need to ship to eat. Isaac money has bought him the freedom to take as long as he wants. That is unusual in indie development and it is the single biggest reason this game might actually be great.
The indie roguelike scene on Switch 2 needs more weird, and Mewgenics fits the gap
Switch 2 is shaping up to be a strong platform for indie roguelikes, but the gap I see is in genuinely strange, mechanically dense indie games of the kind that defined the late-2010s Switch 1 era. Hades 2 is on Switch 2 and excellent. Slay the Spire 2 will be there. Vampire Survivors and its descendants are everywhere. What is missing is the McMillen-shaped hole: games that are weird, ugly, mean, and built around genuinely unfair systems that you slowly learn to manipulate. Mewgenics fits that exact hole.
The portable form factor specifically is going to be enormous for this kind of game. Tactics roguelikes thrive on the 'one more turn, one more run' loop, and that loop is hugely amplified when you can play in five-minute bursts on the toilet, on the train, or in bed before sleep. Isaac on Switch outsold Isaac on every other platform combined for a reason. Mewgenics on Switch 2 is going to follow exactly that pattern.
If McMillen lands the launch, this is a top-five indie of the year for me, and probably the indie roguelike I will end up putting the most hours into. That is a strong claim a year out from any release date, and I am willing to make it because the track record actually supports it.
What to do right now if you're interested
There is no preorder yet, and there is no firm release window. Switch 2 and PS5 are confirmed platforms but McMillen has not committed to a date, and given his history I would budget mentally for late 2026 at the earliest, with 2027 more likely. Do not lock anything in until there is a date. The pattern with McMillen games is that he announces a window, slips it, and then ships within two to three months of the slipped date with a polished build. That is fine. It is not vaporware fine, but it is not Hi-Fi Rush surprise-release fine either.
What is genuinely worth doing now: if you have somehow not played Binding of Isaac: Repentance, get it. Repentance is the final and most complete version of Isaac, and it is on Switch 2 with a Repentance+ enhancement bundle that takes advantage of the new hardware. It is the single best reference point for what McMillen at his peak looks like, and it is the most useful preview of Mewgenics's design sensibilities you can buy today.
And if you are more on the Super Meat Boy side of the McMillen catalog, Super Meat Boy Forever is on Switch and remains a solid platformer, even if it is more Refenes than McMillen at this point.
What I'd actually do
If you have a Switch 2: bookmark Mewgenics, do not preorder, and add Repentance+ to your library if you do not already own it. The Switch 2 patch and the Repentance content are the best $30 to $40 you will spend on a roguelike this year, and they buy you direct experience with the design language that Mewgenics is going to draw from.
If you do not have a Switch 2 and are deciding which platform to wait on Mewgenics for: Switch 2 is the better fit for this kind of game by a comfortable margin. Tactics roguelikes are portable-format games. PS5 will deliver a fine version, but you will play more of the Switch 2 build because you will play it in places you cannot play a PS5.
If you are a McMillen completionist who needs everything: same advice as before, plus keep an eye on Nicalis announcements for any physical or limited release news. McMillen games tend to get nice Limited Run Games physical editions a year or so after release, and the resale market on those is real. A preorder on the eventual Mewgenics LRG is probably the single best speculative gaming buy of late 2026 if it shows up.
Related coverage
On Switch 2 indies and roguelikes more broadly, my coverage of the launch lineup and post-launch indie wave is the right starting point. The Switch 2 handheld mode boost piece explains why this hardware is going to be the better home for tactics and roguelike work. For McMillen-adjacent context, the Pokémon Champions reviews coverage gives a sense of how the strategic-tactics-on-portable space is performing right now and what Mewgenics will be competing against for time.
Read next: 'Switch 2 handheld mode boost: 1080p original games,' 'Pokémon Champions review: the future of VGC starts here,' and 'Don't Nod takes Life is Strange vibe to deep space.'
