Mewgenics Guide: Breeding, Combat, and All 14 Classes

This Mewgenics guide exists because the tutorial tells you almost nothing about why your cats keep dying in fights, or why two seemingly identical parents produce a kitten with garbage stats. It covers movement and the basic breeding prompt, then leaves you to figure out Libido, Comfort, and inbreeding coefficients on your own. What follows is the stat inheritance system that actually decides whether your cats are any good, plus the 14-class roster and how tactical combat rewards positioning over raw stats.

TL;DR: Kittens inherit only their parents' base stats (not stat-boosted versions), weighted toward whichever parent scored higher, and breeding itself is gated by Libido plus a room's Comfort and Stimulation. Combat is turn-based on a grid where facing direction and backstab bonuses matter more than pure damage. There are 14 classes total: 5 available immediately (Collarless, Fighter, Hunter, Mage, Tank) and 9 unlocked by clearing a zone and collecting its collar from Butch.

Mewgenics guide: breeding and combat basics (quick answer)

Breeding happens between two adult cats sharing a room at the end of a day, provided their Libido is high enough and the room's Comfort and Stimulation stats support it. Combat is 4-cat, turn-based, and grid-based, with facing direction determining backstab damage. Classes come from collars, not breeding, so a kitten's stats matter more than its parentage for combat performance.

Key takeaways

• Kittens inherit only base stats rolled 3-7 at birth. Any stat boosts a parent picked up in life (gear, training) do not pass down.
• A room's Comfort stat drives whether cats breed peacefully or start fighting. Low Comfort means more scraps, fewer litters.
• Stimulation biases which parent's stat value a kitten leans toward, so pairing a high-Stimulation room with a strong parent is a real strategy, not luck.
• Combat turn order runs on Speed, and every turn gives one move plus one basic attack plus any mana abilities you can afford.
• Facing matters. Attacking a target's back deals bonus damage, and you choose your own facing after your turn ends, so positioning is a resource.
• There are 14 classes, 5 from the start and 9 gated behind zone clears plus a return trip to Butch.
• High inbreeding coefficients unlock unique disorders and birth defects. It's a real system, not a joke stat.

Overview

This guide covers the version of Mewgenics live on Steam as of this writing (appid 686060), which launched February 10, 2026 from Edmund McMillen and Tyler Glaiel, priced at $29.99. It's sitting at a Very Positive rating across more than 51,000 reviews. If you're past the tutorial and confused about why your third-generation cats are worse than your first, or why your four-cat squad keeps losing to trash mobs, this is written for you.

What this guide covers: the stat inheritance math behind breeding, the house stats that gate it, the core combat loop, and the full class list with unlock conditions. What it doesn't cover: a step-by-step story walkthrough or a tier list ranking every class (some of that depends on your specific stat rolls, which the game is designed to make different for every player).

Breeding and stat inheritance

Every cat rolls seven base stats between 3 and 7 at birth. These aren't cosmetic; they're the raw numbers everything else, including class performance, gets built on top of. The mistake new players make is assuming a good cat produces good kittens automatically. It's closer to a weighted lottery.

Two adult cats can breed if they're in the same room at the end of the day and their Libido is high enough. Libido itself responds to the room's stats: Comfort is the big one, since a low-Comfort room makes cats more likely to fight than mate, and Stimulation decides which parent's stat a kitten leans toward when the two don't match. Put a high-Stimulation room together with your strongest breeder and you're not just hoping for good rolls anymore, you're nudging the odds.

Kittens inherit only the base stat, never a stat that's been boosted through gear, training, or a class bonus. That's the detail that trips people up most: if you've been grinding a cat's stats up through play, none of that carries to its kittens. Only the number it was born with matters for breeding math.

Mutations, Disorders, and inbreeding

A separate house stat, Mutation, rolls at breeding time and can produce two very different outcomes. Mutations are net-positive traits that are themselves inheritable, so a good one is worth chasing across generations. Disorders are the opposite: quirks that make a cat harder to work with. Both get more likely the higher your inbreeding coefficient climbs, and past a certain point you start seeing unique disorders and birth defects that don't show up in a healthier gene pool. If you're breeding the same small family line repeatedly to lock in a stat, expect the downside to show up eventually.

The household screen tracks each cat's inherited stats individually. This one, Mr Dingus, is showing six physical and mental stats, all still at base value before any training.

Five house stats influence breeding overall, with Comfort and Stimulation doing most of the heavy lifting for whether breeding happens and what a kitten looks like when it does. If your cats keep skirmishing instead of pairing up, the fix is almost always a Comfort problem, not a Libido problem you can brute-force.

Tactical combat basics

Fights run turn-based on a procedurally generated isometric grid, four cats at a time. Turn order follows Speed, so a fast build acts more often relative to a slow one, not just "first."

Every cat's turn gives one move and one basic attack for free, plus as many mana abilities as you can afford. Mana is the tight resource here, not health, and your max mana pool scales with Charm. That means a Charm-starved cat isn't just socially weak in dialogue scenes, it's also going to run out of ability uses faster in a fight that goes long.

Facing is the mechanic new players skip past. After your turn ends, you choose which direction your cat faces, and an enemy attacking that cat's back deals a damage bonus. That single choice turns positioning into an ongoing tactical decision every single turn, not a one-time setup at the start of the fight.

A round-3 encounter against the Crater Maker boss. The grid layout and round counter both matter more than raw damage output once fights go past the first couple of turns.

The grid itself isn't just cosmetic terrain either. Environmental hazards interact with abilities in specific ways; a water puddle conducts electricity, for instance, so a lightning ability landing on a puddle can shock every unit standing in it, allies included. Don't fire off area abilities without checking what's underfoot.

Status effects stack deep in this game, more than 50 of them, and they resolve in a fixed priority order: damage-over-time effects first, control effects second, debuffs third. That order matters when you're trying to predict whether a poisoned, stunned target survives to its next turn or not.

GODEEPER: If you're still figuring out which four cats to actually run together, our party composition breakdown for a similarly structured co-op tactics game covers the same tank/DPS/healer logic. Sunderfolk Beginner Guide: Best Classes and Party Tips →

All 14 classes explained

Classes come from collars, which you unlock by clearing zones and turning them in to Butch back at the house. They are not inherited traits, so a kitten's class potential is entirely separate from what its parents were wearing.

The 5 starting classes

• Collarless: no class modifiers at all. Every cat starts here before you assign a collar, and Collarless cats remain useful purely as breeding stock even if you never send them into combat.
• Fighter: melee physical damage. The straightforward pick if you want a cat that just hits things hard up close.
• Hunter: ranged physical damage, built around abilities like Heavy Shot and Arrow Flurry. One of the more reliable early-game damage dealers since it doesn't need to be adjacent to a target.
• Mage: ranged magical damage with access to elemental status effects, so it doubles as your early source of DoTs and control.
• Tank: absorbs damage and can knock enemies around, which doubles as crude crowd control when you need to break up an enemy formation.

The 9 unlockable classes

Each of these ties to clearing a specific zone for the first time, then talking to Butch, who hands you that zone's collar.

• Cleric (Alley collar): the main healer, with enough healing output to keep a team alive through a long fight and reportedly strong enough to be ranked S-tier in third-party tier lists.
• Druid (Crater collar): a summoner and support class built around a permanent Crow familiar that fights alongside it.
• Thief (Sewers collar): built for evasion, backstab damage, and coin collection, rewarding a hit-and-reposition playstyle.
• Necromancer (Boneyard collar): works off corpse mechanics and life leech abilities like Soul Link, turning fallen enemies into a resource.
• Tinkerer (Bunker collar): crafts temporary weapons and gadgets mid-fight instead of relying on a fixed kit.
• Psychic (Moon collar): manipulates the battlefield and enemy positioning directly, more of a control specialist than a damage class.
• Monk (Lab collar): switches between melee and ranged stances and attacks twice per turn, which makes it flexible against mixed enemy compositions.
• Butcher (Core collar): a melee damage dealer built around meat and food generation alongside cleaving attacks.
• Jester (Rift collar): pulls random abilities from other classes instead of having a fixed kit. It has only 4 abilities and no stat modifiers of its own, and it's the hardest class to unlock since it also requires finishing Dr. Beanies' Rift questline on top of the zone clear.

Because kittens inherit stats and not classes, the practical approach is to breed for the stat spread a class needs, then slot the resulting kitten into whichever collar fits. A Mage-leaning kitten needs a strong magic stat far more than it needs a Mage parent.

GODEEPER: Necromancer builds live and die by how well you snowball a single resource over a run. We broke down the same pattern in a different roguelite's necromancer kit. Rune Dice Necromancer Build: Snowball the Skeleton Army →

Tips

Breed for stats, not for looks

It's tempting to pair cats because their colors or patterns look good together. Ignore that. Check the actual stat panel before committing a pair to a room, especially if you're trying to hit a specific class's stat requirements.

Fix Comfort before blaming Libido

If two cats you expect to breed keep fighting instead, the room's Comfort is almost always the actual problem. Libido gates whether breeding is possible at all, but Comfort decides whether cats even get along long enough to try.

Don't dump every ability into one AoE

Given how deep the status effect stack goes (more than 50 effects, in strict priority order), spreading debuffs across a fight often out-values one big burst. A stunned, poisoned target that survives two more turns is doing nothing for two turns; a dead target is doing nothing forever, but you paid full mana for that outcome.

Save Jester for last

Since Jester requires both a zone clear and Dr. Beanies' full Rift questline, it's realistically your final unlock. Don't build a run plan around getting it early.

Watch your inbreeding coefficient across generations

If you keep reusing the same two or three cat lines to lock in a good stat, track how tight that gene pool is getting. The unique disorders that show up past a high inbreeding threshold aren't worth a marginally better stat roll.

Common mistakes

• Assuming a boosted parent passes its boosted stats down. Only the base stat at birth counts. Gear and training bonuses don't inherit.
• Ignoring facing during combat. Ending a turn without considering which direction your cat faces gives up free backstab protection for no reason.
• Treating Collarless cats as useless. They're still valid breeding stock, and forcing a collar onto every single cat just to have "a class" isn't necessary.
• Firing elemental AoE abilities without checking the terrain. A lightning ability over a water puddle can hit your own cats standing in it just as easily as the enemy's.
• Skipping the return trip to Butch. Clearing a zone doesn't automatically grant its class. You still need to go back and collect the collar from him.

Frequently Asked Questions

How many classes are in Mewgenics? 14 total. Five are available from the start: Collarless, Fighter, Hunter, Mage, and Tank. The other nine unlock by clearing specific zones and talking to Butch, who hands out that zone's collar.

How does breeding work in Mewgenics? Two adult cats in the same room can breed at day's end if their Libido is high enough and the room has enough Comfort and Stimulation. Kittens inherit only base stats, biased toward whichever parent has the higher stat in a given category.

Do kittens inherit their parents' class? No. Classes are assigned through collars you unlock, not inherited traits. What kittens inherit are the seven base stats, which then decide how good they'll be once you slot them into a class.

What is the best starting class in Mewgenics? Tank and Hunter carry the early game best since Fighter and Mage both need higher stat floors to be reliable. Collarless cats are still useful as breeding stock even if you never fight with them.

What causes Mutations and Disorders in Mewgenics? Both come from a house's Mutation stat rolling at breeding time. Mutations are net-positive and inheritable. Disorders are troublesome quirks. High inbreeding coefficients raise the odds of both, especially disorders.

How do I unlock the Cleric class in Mewgenics? Clear the Alley zone for the first time, then talk to Butch back at the house. He hands you the Alley collar, which turns any cat wearing it into a Cleric.

Is Mewgenics worth playing if I don't care about breeding? The combat and class system stand on their own, but the breeding system is what most of the endgame optimization is built around. Skipping it means missing a large chunk of what the game is actually about.

Related Reading

• Sunderfolk Beginner Guide: Best Classes and Party Tips: another tactics game where party composition, not raw stats, decides most fights.
• Paralives Mechanics Guide: Needs, Moods, and Paras: a different take on simulation systems, useful if the stat-and-mood layer here is what interests you most.
• Rune Dice Necromancer Build: Snowball the Skeleton Army: for anyone leaning into Mewgenics' own Necromancer collar, the resource-snowball logic carries over almost directly.

References

• Mewgenics on Steam
• Classes - The Mewgenics Wiki