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Alpha 12 - 0.12.906 was released on August 21, 2015 - Alpha 12 Release + Hotfixes

New Contents

Animal Taming

  • Colonists with the Animal Handler work type will now interact with animals.
  • Animal handling success rates are governed by the new Animals skill.
  • Handlers can tame animals. They approach designated wild animals with food and attempt to tame them to make them part of the colony.
  • Handlers can train animals as designated in tame animals’ Training tab. Animal training looks like taming, requires food, and trains one “trainable skill” at a time. Not all animals can learn anything; they need sufficient trainable intelligence.
Trainable skills
  • Obedience: has master, follows master while master is drafted and defends him.
  • Release: master can release animal during combat to attack distant enemies, and call animal back.
  • Rescue: animal will rescue wounded colonists and take them to bed. Animal must be smart and large enough to do this.
  • Haul: animal will intermittently haul items like a colonist would. Animal must be smart enough to do this, and will haul an amount related to its body size.
  • Added Animals main tab, which lists all colony animals and provides interfaces to set their master and area restriction.
  • Each animal has a ‘wildness’ indicating how difficult it is to tame.
  • Animals have a minimum handling skill. Player is warned if they designate taming an animal that no handler can actually tame.
  • Tame animals can be assigned animal areas in which they will try to remain.
  • Tame animals can be bought and sold. Bulk traders carry normal animals, while exotic goods traders can buy and sell any weird animal, pre-tamed.
  • Tame animals can be designated for slaughter and animal handlers will slaughter them.

New Animal Mechanics + Behaviour

  • Some animals (alpaca, muffalo, camel) can be shorn for wool that can be crafted into apparel.
  • Some animals (muffalo, cow, camel) can be milked.
  • Some animals (chicken, cobra, iguana, tortoise, etc) can now lay eggs. Fertilized eggs will hatch. All eggs can be eaten or cooked.
  • Animals can be pregnant and give birth. Animals are made pregnant when a male approaches and mates with a female. Birth is accompanied by amniotic fluid spray.
  • You can now build animal beds and animal boxes and place animal sleeping spots.
  • Animals all sleep.
  • Animals can have different graphics per gender.
  • Animals have “life stages” related to their ages. Baby animals are tiny and weak, juveniles somewhat larger, and adults are full size.
  • Colony starts with a random pet.
  • Animals can nuzzle colonists, improving their mood.
  • Animals can be named when tamed or when nuzzling. Names are drawn from a large bank of animal names.
  • All organisms including animals have life expectancies and will develop chronic conditions like frailty or cataracts in old age.
  • New incident: Farm Animals Wander In (some tame farm animals wander to and join the colony)
  • New incident: Self Tame (random wild animal on map becomes tame).
  • Doctors will treat animals’ wounds if the animal is in a colony bed.
  • Some animals may attack on a failed taming attempt.
  • Animals produce animal filth, proportional to body size, inversely proportional to petness.
  • Tons of new animal graphics and sounds for new animals.

New Animals

  • Boomalope (large fragile animal that explodes and sets fires on death)
  • Thrumbo (giant peaceful powerful creature with amazing fur and horn)
  • Chinchilla (very valuable fur)
  • Capybara
  • Cow
  • Pig
  • Chicken
  • Yorkshire terrier
  • Labrador retriever
  • Husky
  • Elephant

Room Roles and Stats

  • Rooms now have ‘roles’ and stats based on what is inside them. These are automatically-defined values that, in turn, passively affect thoughts and events in the room.
  • Room roles and stats can be inspected with a new inspection tool (bottom right of screen).
Room roles are:
  • Bedroom
  • Barracks
  • Prison bedroom
  • Prison barracks
  • Dining room
  • Hospital
  • Laboratory
  • Kitchen
  • Rec room
  • Tomb
Room stats are:
  • Impressiveness (most important stat; an aggregate of other stats, mostly for pride psychology)
  • Wealth
  • Space
  • Beauty
  • Cleanliness (has a direct effect on medical outcomes)
Room stats affect things like:
  • Immunity gain speed
  • Medical treatment quality
  • Room stats create many variants on thoughts like:
  • Ate in impressive dining room
  • Own impressive bedroom
  • Own bed in impressive barracks
  • Did joy activity in impressive rec room
Added room traits:
  • Greedy: Unhappy without a very impressive room.
  • Jealous: Unhappy if anyone has a room noticeably better than him.
  • Ascetic: Unhappy unless he has a very crappy room.


  • Added ‘facilities’ – passive buildings that give bonuses to nearby buildings:
  • Vitals monitor (improves healing in adjacent medical bed)
  • Tool cabinet (improves production at nearby work table)
  • Multi-analyzer (speeds research at nearby research bench)

Ancient artifacts

  • Ancient artifacts with psychic powers can be bought, sold, and found in ancient crypts.
  • Psychic powers work at any range through obstacles.
  • Artifacts are one-use.
The artifacts are:
  • Psychic insanity lance – drives a single target insane
  • Psychic shock lance – drops a single target asleep
  • Psychic animal pulser – drives animals berserk map-wide
  • Psychic soothe pulser – gives a temporary mood boost to everyone on the map

UI Reworked

  • Main tabs like Work, Outfits, World, Factions, etc are now tabs permanently displayed along the bottom of the screen instead of being buried in an Overview window.
  • Some tabs, like Work, will not take more space than they need to given the number of entries (colonists) to display.

Misc Changes

  • Graves are no longer just glorified storage slots; colonists must actually ‘bury’ corpses.
  • Can now build sarcophagi out of solid materials. High-quality sarcophagi are art items.
  • Colonists will visit graves of dead colonists for a joy activity.
  • New incident: Poison ship. A variation on the psychic drone ship that kills plants in an expanding circle.
  • New Flashstorm. A localized, intense lightning storm in one area of the map. Causes big fires.
  • Added heart attacks. People or animals approaching or past their life expectancy will have a chance of heart attack, which will progress and resolve in a random way. Heart attack is emergency-treatable to improve outcomes.
  • Added hay (animal food only, for getting through winter). Added haygrass (long growing, high yield of hay).
  • Added way to enable/deny medicine in different qualities to any colonist, prisoner, or tame animal, from a the health tab.
  • All furniture is now ‘minifiable’ like televisions and telescopes. This means beds, chairs, etc can be moved without being rebuilt, bought, and sold.
  • New trait: Night owl. Happy when awake at night, sad if awake around midday.
  • New thought: Crowded – In a space with too many people.
  • New installable implant: Painstopper. Prevents all pain, but reduces consciousness permanently.
  • New installable implant: Joywire. Large permanent happiness boost, but reduces consciousness permanently.
  • Furniture can now be art engraved.
  • New floors: gold tile, sterile tile, cream carpet, dark gray carpet.
  • Game start now has a “select random landing site” button if you don’t want to choose.
  • Improvements to trade interface: better layout, expands vertically to use all screen space, increment/decrement buttons and launch/drop all buttons added.
  • Added ‘open’ designator for opening cryptosleep caskets, graves, sarcophagi, and other containers.
  • Manhunter pack incident can use animals besides wargs.
  • Commands are shown if there is at least 1 selected object with this command, instead of requiring all selected things be able to accept the command.
  • Dazed broken pawns will now randomly strip off clothes and drop things.
  • New graphics for squirrel and warg.
  • New graphics for research bench and other buildings.
  • Unskilled or injured growers can fail at harvesting, destroying the harvest for one plant
  • A bunch of new music from Alistair Lindsay.
  • Carrying capacity is now a stat that can change for body size and manipulation capacity.
  • Siegers will never be sent with only melee weapons (too exploitable).
  • Sappers now avoid mining through high-health ores and barriers.
  • Rebalanced crop yields and harvesting challenges so crops require a bit more space.
  • Game will auto-reset mods config on startup crash to try to recover.
  • Tons and tons of bugfixes and other adjustments, refactorings, balancings and tunings.


  • Rebalanced animal hauling, traps, charge rifle, assault rifle. (Alpha 12b)
  • Rebalanced animal hunger rates and plant nutritions so animals need larger grass pastures to be sustainable. (Alpha 12b)
  • Thrumbo is much more powerful in combat. (Alpha 12b)
  • Sleeping pawns now wake up when harmed. (Alpha 12b)
  • Float menu column is wider to avoid cut-off text. (Alpha 12b)
  • Ship part incidents won’t occur so early. (Alpha 12b)
  • First raid comes a bit earlier on Cassandra and Phoebe. (Alpha 12b)
  • Fixed: Manual work priorities being used after switching to non-manual priorities. (Alpha 12b)
  • Fixed: Colonists have ‘colonist left unburied’ thoughts when tame animals were left unburied. (Alpha 12b)
  • Fixed: Eggs can only be used for simple meals (Alpha 12b)
  • Fixed: Trade items dropping in weird places. (Alpha 12b)
  • Fixed: Colonists incapable of violence can slaughter animals. (Alpha 12b)
  • Fixed: Alphabeavers leave the map after they sleep because they get hungry. (Alpha 12b)
  • Fixed: Date changes over at 6am, not midnight. (Alpha 12b)
  • Misc other fixes and improvements. (Alpha 12b)
  • Poison ship part event now only drops one ship part instead of 2-3. (Alpha 12c)
  • Flashstorms are much less intense (Alpha 12d)

RimWorld Releases
1.0.2058 (Version 1.0)
0.19.2009 (Beta 19)
0.18.1722 (Beta 18)
0.17.1557 (Alpha 17B)
0.17.1546 (Alpha 17)
0.16.1393 (Alpha 16)
0.15.1284 (Alpha 15C)
0.15.1280 (Alpha 15B)
0.15.1279 (Alpha 15)
0.14.1249 (Alpha 14E)
0.14.1241 (Alpha 14D)
0.14.1238 (Alpha 14C)
0.14.1236 (Alpha 14B)
0.14.1234 (Alpha 14)
0.13.1135 (Alpha 13)
0.12.906 (Alpha 12)
0.11.877 (Alpha 11)
0.10.785 (Alpha 10)
0.9.722 (Alpha 9)
0.8.657 (Alpha 8)
0.7.581 (Alpha 7)
0.6.532 (Alpha 6)
0.5.492 (Alpha 5)
0.4.460 (Alpha 4)
0.3.410 (Alpha 3)
0.2.363 (Alpha 2)
0.1.334 (Alpha 1)
0.0.232 (Pre-Alpha 1)