A sci-fi colony sim driven by an intelligent AI storyteller. Inspired by Dwarf Fortress and Firefly. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
Recent Reviews:
Overwhelmingly Positive (633) - 96% of the 633 user reviews in the last 30 days are positive.
All Reviews:
Overwhelmingly Positive (12,992) - 97% of the 12,992 user reviews for this game are positive.
Release Date:
Jul 15, 2016
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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“The game is already fully playable, balanced, and generally free of bugs. Over 120,000 players have been enjoying it since our Kickstarter in October 2013. However, we want to add more value before calling it done. We're doing Early Access to indicate that we still intend to add more content to the game.”

Approximately how long will this game be in Early Access?

“We're not sure how long the game will be in Early Access. That said, it's fully playable, low in bugs and balanced now. We're just not sure how much more additional free content we're going to add before calling it done.

To be clear - we might end development soon, or we might continue it for years. Please buy the game only if you want to play it as it exists now - not based on what it might some day become.”

How is the full version planned to differ from the Early Access version?

“Our development changes direction often in response to player feedback, so we can't promise anything. We're also not sure how much will be done - we might end development soon, or continue it for years. However, here are some ideas we're considering (in no particular order).

  • More animals, plants, and biomes.
  • Archaeology so you can dig up and study powerful but dangerous ancient artifacts.
  • Dynamic conversation simulation.
  • Deeper melee combat simulation.
  • Randomized or configurable starting conditions.
  • More quasihuman races - dwarflikes, elflikes, and others.
  • Many more!

Again, while lots of ideas excite us, we can't promise any additional features. Please buy the game only if you want to play it as it exists now - not based on what it might some day become.”

What is the current state of the Early Access version?

“The game is fully playable, low in bugs, and well-balanced. Players have been enjoying the game over 13+ alpha versions we've released since our Kickstarter in October 2013, and many have reported enjoying the game for tens or hundreds of hours.”

Will the game be priced differently during and after Early Access?

“The price may rise after Early Access. We're not sure.

The price won't go down for a while.”

How are you planning on involving the Community in your development process?

“The community has been involved already since October 2013 when our Kickstarter launched. Each of the 13+ major releases since then has been directed and refined based on their feedback, mostly through our forums (http://ludeon.com/forums) and the RimWorld subreddit (http://reddit.com/r/RimWorld).

We intend to continue engaging with players as we have done as it's been very fruitful and enjoyable for all so far!”
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Recent updates View all (25)

October 23

Backstory in game sales will close

We'll be closing sales for to the Backstory-in-Game package and Pirate King packages on November 7, 2017. The Name-in-game package will remain on sale. Anyone who already purchased any of these packages won't be affected, only new sales will be closed.

I'm closing these sales because the game is maturing and it's coming to the right time to make the content final. In addition, closing these will free up more time for us to work on the game itself.

Thanks everyone for all the great content submitted over the last few years! As any player can tell you, it's really enriched the game.
251 comments Read more

June 3

Alpha17b performance hotfix released.

I’ve just released Alpha17b, a performance hotfix for Alpha17. Steam users will get it automatically. This is build 0.17.1557.

When we made the targeting AI smarter in Alpha 17, we also made it harder on the CPU. Players in late game were seeing drastically reduced performance. Alpha17b optimizes this and several other things. There are no changes to gameplay - just optimization of what's there already.

This update will work with your existing saved games, XML-only mods and (hopefully) most or all code mods.

If for any reason you want to continue on the older version, you can set your Steam beta branch to 'alpha17a'.

Sorry for any disruption! We’re also hard at work on Alpha 18.
455 comments Read more
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About This Game

RimWorld is a sci-fi colony sim driven by an intelligent AI storyteller. Inspired by Dwarf Fortress, Firefly, and Dune.

You begin with three survivors of a shipwreck on a distant world.
  • Manage colonists' moods, needs, wounds, and illnesses.
  • Fashion structures, weapons, and apparel from metal, wood, stone, cloth, or futuristic materials.
  • Tame and train cute pets, productive farm animals, and deadly attack beasts.
  • Watch colonists develop and break relationships with family members, lovers, and spouses.
  • Fight pirate raiders, hostile tribes, rampaging animals, giant tunnelling insects and ancient killing machines.
  • Trade with passing ships and trade caravans.
  • Decorate your colony to make it into a pleasurable space.
  • Dig through snow, weather storms, and fight fires.
  • Capture refugees or prisoners and turn them to your side or sell them into slavery.
  • Discover a new generated world each time you play.
  • Build colonies in the desert, jungle, tundra, and more.
  • Learn to play easily with the help of an intelligent and unobtrusive AI tutor.

RimWorld is a story generator. It’s designed to co-author tragic, twisted, and triumphant stories about imprisoned pirates, desperate colonists, starvation and survival. It works by controlling the “random” events that the world throws at you. Every thunderstorm, pirate raid, and traveling salesman is a card dealt into your story by the AI Storyteller. There are several storytellers to choose from. Randy Random does crazy stuff, Cassandra Classic goes for rising tension, and Phoebe Chillax likes to relax.

Your colonists are not professional settlers – they’re crash-landed survivors from a passenger liner destroyed in orbit. You can end up with a nobleman, an accountant, and a housewife. You’ll acquire more colonists by capturing them in combat and turning them to your side, buying them from slave traders, or taking in refugees. So your colony will always be a motley crew.

Each person’s background is tracked and affects how they play. A nobleman will be great at social skills (recruiting prisoners, negotiating trade prices), but refuse to do physical work. A farm oaf knows how to grow food by long experience, but cannot do research. A nerdy scientist is great at research, but cannot do social tasks at all. A genetically engineered assassin can do nothing but kill – but he does that very well.

Colonists develop - and destroy - relationships. Each has an opinion of the others, which determines whether they'll become lovers, marry, cheat, or fight. Perhaps your two best colonists are happily married - until one of them falls for the dashing surgeon who saved her from a gunshot wound.

The game generates a whole planet from pole to equator. You choose whether to land your crash pods in a cold northern tundra, a parched desert plain, a temperate forest, or a steaming equatorial jungle. Different areas have different animals, plants, diseases, temperatures, rainfall, mineral resources, and terrain. These challenges of surviving in a disease-infested, choking jungle are very different from those in a parched desert wasteland or a frozen tundra with a two-month growing season.

You can tame and train animals. Lovable pets will cheer up sad colonists. Farm animals can be worked, milked, and sheared. Attack beasts can be released upon your enemies. There are many animals - cats, labrador retrievers, grizzly bears, camels, cougars, chinchillas, chickens, and exotic alien-like lifeforms.

People in RimWorld constantly observe their situation and surroundings in order to decide how to feel at any given moment. They respond to hunger and fatigue, witnessing death, disrespectfully unburied corpses, being wounded, being left in darkness, getting packed into cramped environments, sleeping outside or in the same room as others, and many other situations. If they're too stressed, they might lash out or break down.

Wounds, infections, prosthetics, and chronic conditions are tracked on each body part and affect characters' capacities. Eye injuries make it hard to shoot or do surgery. Wounded legs slow people down. Hands, brain, mouth, heart, liver, kidneys, stomach, feet, fingers, toes, and more can all be wounded, diseased, or missing, and all have logical in-game effects. And other species have their own body layouts - take off a deer's leg, and it can still hobble on the other three. Take off a rhino's horn, and it's much less dangerous.

You can repair body parts with prosthetics ranging from primitive to transcendent. A peg leg will get Joe Colonist walking after an unfortunate incident with a rhinoceros, but he'll still be quite slow. Buy an expensive bionic leg from a trader the next year, and Joe becomes a superhuman runner. You can even extract, sell, buy, and transplant internal organs.

And there's much more than that! The game is easy to mod and has an active mod community. Read more at http://rimworldgame.com.

(All non-English translations are made by fans.)

System Requirements

Windows
Mac OS X
SteamOS + Linux
    Minimum:
    • OS: Windows XP
    • Processor: Core 2 Duo
    • Memory: 4 GB RAM
    • Graphics: Intel HD Graphics 3000 with 384 MB of RAM
    • Storage: 500 MB available space
    Minimum:
    • OS: OSX 10.5
    • Processor: Core 2 Duo
    • Memory: 4 GB RAM
    • Graphics: Intel HD Graphics 3000 with 384 MB of RAM
    • Storage: 500 MB available space
    Minimum:
    • Processor: Core 2 Duo
    • Memory: 4 GB RAM
    • Graphics: Intel HD Graphics 3000 with 384 MB of RAM
    • Storage: 500 MB available space
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