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 (696) - 95% of the 696 user reviews in the last 30 days are positive.
All Reviews:
Overwhelmingly Positive (20,799) - 97% of the 20,799 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 one million players have been enjoying it since our Kickstarter in October 2013. All major content pieces are in place, and we're currently doing final balancing and polishing. We're doing Early Access to indicate that it's still in final testing.”

Approximately how long will this game be in Early Access?

“The game is generally content-complete, we're doing final polishing, so the full release should be relatively soon.”

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

“Since we're currently in the final polishing stage, the final game will only differ from the Early Access version by being better balanced, faster, more polished in general. There won't be major content updates at this late stage.”

What is the current state of the Early Access version?

“The game is fully playable, low in bugs, and well-balanced. It is in the final stages of polishing before release.”

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

“The final version price will be higher than the Early Access price.

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 2013 when our Kickstarter launched. Each of the many 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 (29)

September 5

Unstable version testing and a call for translators

A new build is up on the unstable branch.

If you are playing with mods but were on the unstable branch from an earlier testing phase, change back to default branch now. The code for this update should be 99% mod-compatible, but the mods won't work until they're recompiled because the binary API for the translation system changed.

The game content is exactly the same as Beta 19. There are some bugfixes, but the most important thing is the new localization system. It'll help translators more accurately translate the game into non-English languages, with issues like grammatical gender (e.g. le/la in French) respected and better automatic handling of grammar for a variety of languages.

Below is a forum post from Piotr Walczak, who implemented the latest improvements, explaining what translators can do to take advantage of the new functionality.

Forum post: New keyed translations format

For anyone interested in helping translate, now would be a great time! The game content is stable, the grammar code is in, and we're on the final push to get things set for the 1.0 release. Potential translators should please take a look the forum post below to learn how to contribute. Thanks in advance.

Forum post: How to contribute to translations

Forum post: Help check the language workers
50 comments Read more

September 5

Early access price and final price

So, RimWorld's early access price has been $30 USD since we first started selling the game in 2013.

Buying an early access game is risky compared to buying a finished game. Also, RimWorld's value in content (and the time players tend to play it) have gone up a lot since those early days. There's also the matter of simple financial inflation. Because of these factors, the final price will be higher than the early access price.

The early access price will remain the same for the rest of the early access period - this change will only occur when 1.0 is released. And of course, anyone who bought during Early Access will get the final version for no additional cost.

I wanted to let everyone know about this ahead of time so people have time to make an informed purchasing decision without surprises.

As of now there's no announced release date for 1.0 yet - still working on filling in all those final details!

Discussion on the Ludeon forums.
202 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.
  • Build colonies in the forest, desert, jungle, tundra, and more.
  • Watch colonists develop and break relationships with family members, lovers, and spouses.
  • Replace wounded limbs and organs with prosthetics, bionics, or biological parts harvested from others.
  • Fight pirates, tribes, mad animals, giant insects and ancient killing machines.
  • Craft structures, weapons, and apparel from metal, wood, stone, cloth, and futuristic materials.
  • Tame and train cute pets, productive farm animals, and deadly attack beasts.
  • Trade with passing ships and caravans.
  • Form caravans complete quests, trade, attack other factions, or migrate your whole colony.
  • 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.
  • Explore hundreds of wild and interesting mods on the Steam Workshop.
  • 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 flat, 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.

Travel across the planet. You're not stuck in one place. You can form a caravan of people, animals, and prisoners. Rescue kidnapped former allies from pirate outposts, attend peace talks, trade with other factions, attack enemy colonies, and complete other quests. You can even pack up your entire colony and move to a new place. You can use rocket-powered transport pods to travel faster.

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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