1–4 player co-op · Twin-stick extraction roguelite

The colony went silent. Something is breeding in the dark. Drop into a living alien hive with up to three friends, reach the stranded crew before the Breeders do, and fight your way to extraction.

WISHLIST ON STEAM WATCH GAMEPLAY
Windows · SteamOSBuilt for Steam DeckOnline and local co-op
The concept

A rescue mission inside something alive.

Breeder Protocol is a top-down co-op shooter about getting people out. The hive is grown fresh for every run, the survivors are cocooned deep inside it, and the Breeders want them as much as you do.

Your squad is four strong, always: friends online or on the couch, with bots holding any empty slot. Manage heat instead of reloading, draft perks as you level up mid-run, and call in orbital strikes with arrow codes under fire.

Breeder Protocol concept art: four operators ring an uplink beacon as the swarm closes in
Concept art
01 · DROP

A hive that never existed before.

Tunnels, egg nurseries, flesh pits and the ruins of the colony itself, grown fresh for every run.

02 · RESCUE

Get there first.

Survivors are cocooned deep inside. Every second you waste, a Breeder gets closer to them.

03 · EXTRACT

Hold the pad.

Power the uplinks, unlock evac and hold the pad while the hive throws everything it has at you.

Captured in the game

Inside the hive.

In-engine captures with a camera move added · no sound
The squad holds a nest chamber.
Flame across the uplink deck.
Extraction open.
Volleys at the bulkhead.
Screenshots

Real gameplay.

In-engine, HUD on. Click to view full size.
Breeder Protocol screenshot: A four-operator squad fires into a nest chamber filled with violet hive growth
The squad holds a doorway while the hive pours in.
Breeder Protocol screenshot: An operator sprays flame across a hazard-striped deck toward the uplink
Gallagher clears the uplink with an incinerator.
Breeder Protocol screenshot: The extraction pad lights up as the squad fights through a lava-lit nursery
Extraction open. Everyone to the pad.
Breeder Protocol screenshot: Flame and tracers cut across a field of glowing egg sacs
Burn the nursery before it hatches.
Breeder Protocol screenshot: An operator stands on the glowing uplink beacon in a colony deck
Bring the uplink online.
Breeder Protocol screenshot: Laser volleys streak across a steel deck toward a sealed bulkhead
Hold the line at the bulkhead.
Twelve operators

Marines and androids. Every one of them talks.

Each operator has a voice, a personality and a signature ability: call down a Rally Cry, hijack an enemy drone, ring yourself in napalm or perform field surgery under fire. Bots fill any empty slot, so the squad is always four strong.

Vasquez, veteran sergeant
HUMANVASQUEZVeteran sergeant
Deacon, rookie rifleman
HUMANDEACONRookie rifleman
Tanaka, marksman
HUMANTANAKAMarksman
Doc, field medic
HUMANDOCField medic
Seven, tactical analyst
ANDROIDSEVENTactical analyst
Halcyon, valet unit
ANDROIDHALCYONValet unit
Kestrel, prototype combat frame
ANDROIDKESTRELPrototype combat frame
Nan, medical android
ANDROIDNANMedical android
Volkova, demolitions expert
HUMANVOLKOVADemolitions expert
Tafuna, heavy gunner
HUMANTAFUNAHeavy gunner
Gallagher, incinerator
HUMANGALLAGHERIncinerator
Glitch, droid hacker
HUMANGLITCHDroid hacker
Build a deadlier squad

Five weapons. No reloads. Just heat.

WeaponsPulse Rifle, Breach Scattergun, Smartgun, Incinerator and Arc Caster. Manage heat instead of reloading.
Field UpgradesLevel up mid-run and draft perks that stack into a build: piercing rounds, split chambers, nanite harvest and more.
Call-insOrbital strikes, supply pods, heavy sentries and reinforcements, entered as arrow codes under fire.
Between dropsSpend credits and scrap on weapons, mods and boosts. Take contracts with their own mutators.
Play your way

Campaign, dailies and the Swarm.

CampaignEndless depth. Every fourth depth, a Brood Mother.
Daily & WeeklyThe same hive for everyone today, and three chained deep drops every week.
SwarmFour minutes, up to 260 aliens on screen. Survive, then get everyone to the pad.
Co-opOnline with a room code or local with controllers. Players drop into a bot's slot mid-mission.
WorkshopBuild contracts and share them with your squad as codes.
IronmanFallen operators stay fallen. Stress, traumas and a medbay.

Full controller support · Built for Steam Deck · 26 achievements · Steam Cloud saves · Windows and SteamOS

Concept art

Where the hive started.

Concept art · not in-game footage
A Breeder breaks through. Animated concept art.
The egg nursery. Animated concept art.
Holding the hive mouth. Animated concept art.
Breeder Protocol concept art: Marines push through an organic cavern lit by glowing egg sacs
Breeder Protocol concept art: A squad advances past a colony bulkhead as Breeders swarm out of the hive wall
Breeder Protocol concept art: Operators fight beside a sealed door while violet growth spreads across the floor
Breeder Protocol concept art: A firefight in a red-lit flesh chamber around a massive hive heart
Breeder Protocol concept art: Tracers cut across a green-lit cavern toward a towering Breeder
Breeder Protocol concept art: A squad holds a colony corridor where the hive has broken through
Breeder Protocol concept art: Flamers and rifles hold back a violet swarm on a steel deck
Breeder Protocol concept art: The extraction pad glows under a swarm of violet hive growth
Breeder Protocol concept art: An operator ring on a dark wet deck, the squad spread out to cover every angle

Your squad is waiting.

Wishlist Breeder Protocol on Steam and you'll hear the moment it drops.

WISHLIST ON STEAM PRESS KIT

Developed and published by Revenant Machine.