A survival sim for Mac & iPhone

You don't control it.
You keep it alive.

Kritterz is a tiny creature with its own hunger, fear and curiosity. Drop food, let it find tools, choose its instincts, and watch it evolve from a Sproutling into a World Ruler with a colony at its back.

No account needed · Game Center achievements

Evolution

Ten stages. Five bodies. One stubborn little critter.

Open the field guide →
Milestones 0–9Sproutling → ForagerFood Sense · Energy Store
Milestones 10–19Scout → SurvivorDanger Detection · Dash Escape
Milestones 20–29Predator → HunterReactive Shield · Hunter Strike
Milestones 30–39Apex Critter → DominatorShockwave · Territory Pulse
Milestones 40–49Conqueror → World RulerSwarm Summon · Apex Override

It thinks for itself

Seven drives compete for control every moment. The most urgent one wins. You only get to tip the scales.

Hunger
Fear
Scavenge
Harvest
Hunt
Territory
Curiosity

Example drive readout

You shape its instincts

At milestones 10, 20, 30 and 40 the world pauses and you pick one of two traits. The choice is permanent.

1Bold InstinctsHunts aggressively, fear response reduced.
2Cautious MindHeightened danger sense, freer exploration when safe.
See every trait →

The world pushes back

Predators evolve right alongside your critter. From milestone 35, a siege of four Leviathans arrives every 45 seconds.

Crawler
Stalker
Ravager
Alpha
Titan
Leviathan
Meet the bestiary →
Colony

At milestone 10, it stops being alone.

A well-fed critter reproduces every 45 seconds. Followers choose their own traits, rally to the leader with Swarm Summon, and the run only ends when the last of them falls.

8critters in a full colony
45sbetween births
75energy needed to reproduce

16 Game Center achievements

See them all →
First Breath
Scout
Apex
World Ruler
Colony Founded
Full Colony
Gluttony
Siege Survivor
Michael Malone, creator of Kritterz
Meet the creator

Dreamed up by an 11-year-old.

Kritterz started in the imagination of Michael Malone, age 11.

Michael had a big idea: a tiny creature that thinks for itself, hunts for food, dodges predators and grows into something unstoppable. He poured every detail into an AI, from what his critter eats to what hunts it and how it evolves, and watched his words turn into a real, working game.

With a little help from his dad, Kritterz hatched. Now it's out in the wild and ready for everyone to play.

Michael Malone Game designer, age 11

Keep it alive.

One critter. Fifty milestones. Every run plays out differently because the critter makes its own choices.

Store links go here once the app is live.