What kind of game this is
Kittens Game is a browser incremental about a village of cats, opening with one button that says Catnip. Its own site calls it a Dark Souls of incremental gaming, a joke that doubles as a warning. Most games in this genre only ratchet upward. This one takes things back. Kittens starve. There are achievements for having ten of your cats starve to death in one run, and another for a hundred.
What makes it feel different is the calendar. A game day lasts two seconds and a year is 400 days, four seasons of 100 days each, so a year passes in a bit over thirteen minutes whether you are watching or not. Catnip fields yield half again as much in spring and about a quarter of normal in winter, and from the fourth year a season can roll warm or cold on top of that. The economy you built in a good summer is not the one that has to survive the winter, and nothing warns you which winter is coming.
The loop
Click for catnip. Catnip buys a field, fields grow catnip on their own, catnip buys a hut, a hut holds two kittens. Every kitten eats. That last sentence is the entire game.
Kittens get assigned to jobs: farmer, woodcutter, scholar, hunter, miner, priest, geologist. Every job you fill takes a mouth off food and points it at wood, science, minerals or faith, which are what actually move a run forward. Science opens buildings, buildings open crafting, crafting opens trade with the other species on the map. Thirty-odd buildings and fifty-odd resources later, the shape of a run is still one long argument between growth and food.
Happiness is the lever new players miss. Overcrowding pushes it down, luxury goods and festivals push it up, and unhappy kittens produce less, so a village that grew too fast is slow as well as hungry.
The reset layer
Resetting wipes the run, and what survives depends on how large the village was when you pulled the lever. Above 35 kittens you bank karma, a permanent happiness bonus. Above 70 you earn paragon, one point per kitten past the threshold, which raises production and storage in every future run and can be spent in a metaphysics tree on structural upgrades rather than flat percentages.
Further in, a second reset economy sits on top of the first. Chronospheres carry a share of your resources through a reset, cryochambers carry kittens through, and the Time tab turns time into something you bank and spend. A challenges list opens as well: optional handicaps such as Anarchy, Atheism, 1000 Years and Winter Is Coming, each with a permanent reward for finishing it.
Controls, and the phone question
Tabs of text and rows of buttons is the whole interface: no art, no animation, a resource table down one side. You click, and after the first hour you barely click at all. Learn the two modifiers early, because later buildings are bought by the dozen: ctrl and click buys several at once, shift and click buys as many as you can afford.
On desktop it is comfortable. On a phone browser it is cramped, since the layout is a wide multi-column table. The paid Android and iOS apps are built for the smaller screen and are the version to use if a phone is where you will play.
Closing the tab is not punished, which is unusual. While the game is closed or paused you build temporal flux at a fixed rate and spend it to fast-forward on your return, with a separate capped offline catch-up on top.
How long it takes
Longer than you expect, and it depends where you stop. A first run to a reset worth taking is weeks of real time with the tab open somewhere, not an evening. Reaching the space tier and the time mechanics behind it is a project people measure in months. If you want something you can finish this weekend, pick a different game.
Where people bounce off
Do not build a hut just because you can afford one. Population is a cost before it is an income, and the classic first death is a player who doubled their kittens in autumn and watched half of them die in winter. Build when catnip is comfortably in surplus, not when it is merely positive, and size the buffer for winter rather than for today. Barns before huts, most of the time.
Put your first spare kittens on farming, then move them to woodcutters and scholars once food is stable. Science is the bottleneck for most of the early game, and libraries are cheap.
Hunting is not optional. Hunters bring back furs and ivory, and you want those crafted and traded rather than left in the ledger. Later, once Navigation gives you trade ships, the Zebras are where titanium comes from.
Reset earlier than feels right. Your first run is not supposed to be your good run. Paragon makes the second attempt much less painful, and the players who grind a first save into the ground are the ones who quit before seeing what the game becomes.
Who made it, and where to play it
Kittens Game is the work of bloodrizer, publishing as Nuclear Unicorn, in development for over a decade with a long list of community contributors credited on its front page. The browser version is free at kittensgame.com. Paid Android and iOS apps exist, and a Steam release entered Early Access on 10 February 2026 for Windows, macOS and Linux.
The source is public, but it is not open source. It carries a custom licence called the Wet Paws Licence, which permits changes for personal or educational use and forbids commercial use and derivative works. That is a clear no to hosting a copy here, so nothing on this site runs it. Play it on the developer's own site, or buy a port.