Mewgenics Guide

The ultimate Mewgenics guide with an interactive breeding calculator powered by exact genetics formulas, a house planner for all 1,258 furniture pieces, and in-depth class build guides. Master Mendelian inheritance, optimize your Stimulation values, and conquer every boss.

🎒
1046
Items
🪑
1258
Furniture
🐱
15
Classes
💀
32
Bosses
🎒
1046
Items
🪑
1258
Furniture
🐱
15
Classes
💀
32
Bosses

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About Mewgenics

DeveloperEdmund McMillen & Tyler Glaiel
PublisherEdmund McMillen
Release DateFebruary 10, 2026
PlatformsPC (Steam)
GenreTactical Turn-Based Roguelike
RatingMetacritic: 90

Mewgenics is a tactical turn-based roguelike created by Edmund McMillen (The Binding of Isaac) and Tyler Glaiel. Released on February 10, 2026, it peaked at 115,428 concurrent Steam players — surpassing Hades 2 — and sold over one million copies in its first week. The game earned a Metacritic score of 90, cementing its place as one of the highest-rated indie releases of the year.

At its core, Mewgenics features a deep Mendelian genetics system where players breed cats with 79+ dominant and recessive traits, optimizing stats through Stimulation-driven probability formulas. With 15 classes ranging from Fighter to Jester, over 1,046 items, and 32 bosses (including hidden house invaders and multi-phase final encounters), the game offers hundreds of hours of strategic depth.

Our Mewgenics guide provides the tools the community needs most: an interactive breeding calculator with exact inheritance formulas reverse-engineered from the game code, a house planner covering all 700+ furniture pieces with adjacency bonuses, and comprehensive class guides for all 15 classes. Whether you're min-maxing your cattery or conquering The Rift, our data-driven tools give you the edge.

Frequently Asked Questions

How does the breeding formula work in Mewgenics?+
Each of the 7 stats (STR/DEX/CON/INT/SPD/CHA/LCK) independently selects from one parent. The probability of inheriting the higher stat is (1 + 0.01 x Stimulation) / (2 + 0.01 x Stimulation). At Stimulation 0 it's a coin flip (50%); at Stimulation 100 it reaches about 66.7%.
What does Stimulation do for breeding?+
Stimulation affects multiple inheritance probabilities: higher stats are more likely to pass down, the first active skill is guaranteed at Stimulation 32+, passive skills are guaranteed at 95+, and the second active skill at 196+. Increase Stimulation through furniture placement in your house.
What is the inbreeding risk in Mewgenics?+
Inbreeding is calculated using Wright's Coefficient of Inbreeding (COI). Birth defect probability follows the formula: 0.02 + 0.4 x clamp(coefficient - 0.2, 0, 1), maxing out at 42%. Cats related within 4 generations raise the coefficient; stray cats always have a coefficient of 0.
How do I unlock new classes in Mewgenics?+
Most classes unlock by clearing specific areas: Cleric from The Alley, Monk from The Lab, Druid from The Crater, Necromancer from Junkyard, Psychic from The Moon, and Tinkerer from Shelter. Jester is the hardest, requiring you to defeat the Chaos Boss in The Rift.
How does furniture optimization work in Mewgenics?+
Furniture affects five house stats: Appeal, Comfort, Stimulation, Health, and Mutation. The adjacency system grants bonus stats when specific furniture pieces are placed next to each other. Prioritize Stimulation for breeding and Comfort for reducing cat fights.