Mewgenics has a cruel philosophy baked into its DNA: the moment you raise a cat worth caring about, the game invents something new to destroy it. Each zone is a gauntlet of mini bosses, zone gatekeepers, act-ending nightmares, and kaiju-scale house invaders that only your retired veterans can handle. Every major encounter arrives with a full animated cutscene and a vocal remix of the zone theme. Once those vocals kick in, start saying your goodbyes.
This guide covers every boss encounter across all three acts, both secret zones, and the true final boss so you stop sacrificing perfectly good cats to mechanics you didn’t see coming.
Act One: Welcome to the Gutter
Act One is a crash course in positional awareness. The game will punish you hard for standing still, grouping up, or ignoring environmental hazards. Ranged attackers aren’t optional here — they’re survival equipment.
The Alley and The Junkyard
The first two zones introduce spacing and hazard management through mini bosses Maisie, Fenrir, and Lucy. Fenrir lays traps in tall grass, so bring a ranged attacker immediately or you’ll be springing them with cat bodies.
The Alley’s zone boss is either Radical Rat or Queen Hippo. Radical Rat lobs bombs across the arena that you have to physically intercept before they detonate — and if one lands in fire, it goes off instantly. Spread your team wide and dedicate one ranged attacker to nothing but bomb disposal.
Queen Hippo hits harder the longer the fight runs and chains knockback attacks that will devastate any stacked formation. Never line your cats up in a row. Here’s the thing though: she scripted-dies at the end of round four regardless of damage dealt. If your offense is weak, just hunker down and outlast her.
The Junkyard ends with Chubs and Nubs, a chaotic duo that spews poison in whatever direction they’re facing when hit. Focus Nubs first to clear the poison pressure, and don’t worry too much about their movement — they waste plenty of turns jumping into empty tiles.
The Sewers, The Boneyard, and The Caves
Boris closes out the Sewers with a deceptively simple gimmick. He has no attack stat and deals damage purely by walking over your cats. He always moves toward whatever unit last hit him, so scatter your team to the arena’s corners and watch him shuffle uselessly between them while doing nothing.
The Boneyard’s act boss Dybbuk is where a lot of first-time players hit a wall. He dodges every single-target attack automatically — basic melee does nothing. You need AoE spells, line attacks, or Bleed and Poison to damage him. Kill him and he immediately possesses the cat that landed the finishing blow. Then you have to kill your own teammate. Yes, really.
Spinnerette closes the Caves by webbing your units in place and burrowing her spiderlings into living cats. If an infested cat dies before you kill the spiderling inside it, the spiderling erupts and permanently destroys the body. Keep a tank in her face, never attack her from behind (she enrages), and kill every baby spider the second it appears.
Act One Secret Bosses: The Throbbing Domain
Clearing the Boneyard or the Caves triggers a house invasion from Guillotina. You fight her three times using retired cats to unlock the secret zone.
The Guillotina Trilogy
Fight one is a damage race — stack DoT effects and melt her health pool. Fight two splits her into a head and a body. Kill the head first, but be warned: doing so immediately heals the body for 100 HP before phase three. Use knockback abilities to physically stop the body from reattaching.
Fight three introduces zombie mechanics. If you destroy Guillotina’s head in this phase, a second boss called Mama Maggot spawns on top of everything else. Defeating Guillotina earns her head, which you sacrifice at a meat altar to access The Throbbing Domain.
Throbbing King
A fetus on a meat throne. The central mechanic is Follow Orders — each round the boss marks specific safe tiles, and at the end of the round tentacles erupt from every unmarked square for massive damage. Move your cats to safe zones before doing anything else, every single round without exception. Phase two sends him off the throne and introduces a piercing vomit blast that causes heavy bleed. Bring healers you actually trust.
Act Two: Dice Rolls and Cosmic Horrors
Act Two stops being a positioning game and starts being a mechanics game. Every major boss fight introduces a gimmick that directly punishes tunnel vision.
The Desert and The Crater
The Desert offers three possible zone bosses. Dust Devil throws tornadoes that randomly fling your cats anywhere on the map — try to have positioning redundancy built into your formation. Gambit uses a six-sided die to determine spells. Attack the die to force a reroll whenever it shows a five or six. Zodiac only shoots at things that move, so bring Mages or Hunters who can deal damage from a static position and let him waste ammo on random objects.
Crater Maker is a puzzle boss occupying a full 3×3 grid that cycles through four attacks each time she takes a hit. If you’re running passive damage sources like Thorns or familiar attacks, you risk accidentally skipping her cycle straight into an instant kill move. Count your hits deliberately and manage her phase rotation.
The Bunker, The Moon, and The Core
Bumblefoot in the Bunker runs a strict three-step loop: jump, spew bones, eat corpses. Do not use Play Dead or Seppuku here — Bumblefoot will eat downed bodies and permanently destroy them. Also avoid attacking its rear end, which triggers poison gas and Thorns retaliation. Zone boss Johnny is a crying zombie who can’t attack at all but hides behind a wall of cultist minions. Kill every minion and the fight ends itself.
Man in the Moon is the act’s centerpiece fight. Two floating hands guard him and you have to bait them into facing him so their dash attacks connect with his face. If he swallows one of your cats, use the “Stop Hitting Yourself” command from inside his stomach to force his own hands to hit him. If you have the Scalding Orb equipped, getting swallowed straight-up kills him from the inside. One of the most satisfying wins in the game.
The Core ends with a two-part event. The Coven spends four turns lighting candles that each grant massive buffs to The Tormentor. Use Wet or Wind abilities to put those candles out as fast as possible. The Coven also summons 1 HP flies throughout the fight, which is a blessing if your build has on-kill triggers — a solid build strategy similar to what makes trophy hunting so satisfying in games like Nioh 3.
Act Two Secret Bosses: The Kaiju Wars
Act Two brings Godzilla-scale house invasions. You need a deep roster of retired veterans or these fights will end your run on the doorstep.
Pyrophina and Zaratana
Pyrophina breathes fire and stomps, shoving cats into burning border tiles. Zaratana is a magnetized asteroid creature that pulls fragile support units into flying space rocks. You face them separately first, then fight both simultaneously. They’ll damage each other constantly during the combined brawl. Focus whoever is lower health, survive the crossfire, and claim a boss collar when it’s done.
Soahc
Take a boss collar to the correct obelisk and you access The Rift and its secret boss Soahc — Chaos spelled backward, in case that wasn’t obvious. This ceiling-mounted eyeball teleports constantly and mimics the abilities of previous bosses. Watch the visual flashes between phases to identify which form it’s using next, then place Sentry Mode traps on its predictable teleport destinations.
Act Three: Time Travel and True Gods
Act Three throws fairness entirely out the window. Cybernetic clones, prehistoric dinosaurs, timeline paradoxes — it’s all on the table. Keep an eye out for Arthur, a special class-based mini boss who can appear in any zone during this act.
The Lab and Das Füture
The Lab pits you against clone versions of your own playable classes: Alice, Chan Hung, Draven, and Franklin. The zone boss is either Spewer, who creates toxic puddles and swallows cats caught in straight lines, or Stacy, Dr. Beanies’ clone. Check the pre-fight dialogue carefully — it tells you which randomized defensive buffs Stacy has equipped for that specific run.
Das Füture closes with Hitler II, a preserved head in a giant mech suit. During phase one, he executes his own clones whenever their health gets low — stripping you of kill triggers and on-death procs. Burst them from full health or you get nothing. Once the mech activates, bait it into walking over its own grenades to strip its armor plating.
Ice Age, The Jurassic, and The End
Lord Bunga sits on a throne of bones and enters phase two by biting the head off a baby, gaining an instant kill aura that permanently erases any cat that ends its turn adjacent to him. Keep distance or lose cats forever.
Dreadnoughtus is so massive you only fight its legs. Focus everything on one leg at a time to trigger a head-crash stun window — your one clean damage phase. The kind of giant-scale encounter that rewards patience, similar to tracking down tough hidden targets like crow relics in Crisol: Theater of Idols.
The Mother is the act boss of The End zone. She slowly fills the arena with darkness and drags cats into her mouth with tentacle arms. Destroy her blob appendages aggressively and constantly. If you let them accumulate, the arena shrinks to nothing.
The C-Series Robots
Act Three house invasions are unsubtle Terminator parodies. C-800 uses a shotgun and will suplex any cat that tries to get close. C-1000 is liquid metal that clones one of your party members — but its AI always targets the weakest unit on the board, so bring a naked, classless retired cat as a decoy and the clone mechanic becomes pointless.
The final house fight is Hitler III in a UFO, summoning robotic versions of every mini boss you’ve encountered throughout the entire game. Stay calm, prioritize threats by damage output, and don’t panic-stack your team.
The True Final Encounter: The Infinite
Collect all three signal antennas from the house bosses, complete the nuclear questline, and you unlock The Infinite. This is the real ending.
Phase One: The Creator
The Creator pushes away anything that attacks it directly. Instead, it summons perfect clones of your current party — fully equipped, fully optimized, basically you. Focus the doppelganger of your highest damage dealer first, or the mirror match gets out of hand fast.
Phase Two: The Destroyer
The Destroyer has a directional shield that permanently blocks incoming attacks from whatever angle it last took a hit from. You have to coordinate your entire team to alternate attack angles constantly. When it winds up Holy Blast, the shield drops — use that window to dump every cooldown into its flanks. This is the longest fight in Mewgenics. Bring your best sustain setup and expect a marathon.
Complete Mewgenics Boss Roster
Every boss, every zone, every type — your master reference sheet.
| Boss Name | Zone & Type |
|---|---|
| Pebbles | The Path (Tutorial) |
| Maisie, Fenrir, Lucy | The Alley (Mini-Bosses) |
| Radical Rat OR Queen Hippo | The Alley (Zone Boss) |
| Trampy, Flushmaster, Rat King | The Sewers (Mini-Bosses) |
| Boris | The Sewers (Zone Boss) |
| Chubs ‘n’ Nubs | The Junkyard (Zone Boss) |
| Morana, Marshmallow, Dack | The Boneyard (Mini-Bosses) |
| Dybbuk | The Boneyard (End-of-Act Boss) |
| Rocky Bobo, Big Slime | The Caves (Mini-Bosses) |
| Spinnerette | The Caves (End-of-Act Boss) |
| Guillotina (Fights 1, 2, and 3) | Your Home (Act 1 House Boss) |
| Throbbing King | The Throbbing Domain (Secret Act 1 Boss) |
| Dack, Gein, Morana, Marshmallow | The Desert (Mini-Bosses) |
| Dust Devil OR Zodiac OR Gambit | The Desert (Zone Boss) |
| Infested Pair, Rocky Bobo | The Crater (Mini-Bosses) |
| Crater Maker | The Crater (Zone Boss) |
| Bumblefoot, Lenny | The Bunker (Mini-Bosses) |
| Johnny | The Bunker (Zone Boss) |
| The Abandoned Ones | The Moon (Mini-Boss) |
| Man in the Moon | The Moon (End-of-Act Boss) |
| Cerberubs | The Core (Mini-Boss) |
| The Coven + Tormentor | The Core (End-of-Act Boss) |
| Pyrophina, Zaratana | Your Home (Act 2 House Bosses) |
| Soahc | The Rift (Secret Act 2 Boss) |
| Alice, Chan Hung, Draven, Franklin | The Lab (Mini-Bosses) |
| Spewer OR Stacy | The Lab (Zone Boss) |
| Frostbiter, The Rocksnows | Ice Age (Mini-Bosses) |
| Lord Bunga | Ice Age (Zone Boss) |
| Dr. Mangler, Zapphauser | Das Füture (Mini-Bosses) |
| Hitler II | Das Füture (Zone Boss) |
| Dino Lovers | The Jurassic (Mini-Boss) |
| Dreadnoughtus | The Jurassic (End-of-Act Boss) |
| The Bloat | The End (Mini-Boss) |
| The Mother | The End (End-of-Act Boss) |
| Arthur | Any Act 3 Zone (Special Mini-Boss) |
| C-800, C-1000, Hitler III | Your Home (Act 3 House Bosses) |
| The Creator / The Destroyer | The Infinite (True Final Boss) |