Slavery

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Slavery in base game RimWorld is limited only to selling prisoners for profit, with no other use. The Ideology DLC significantly expands on the concept, allowing prisoners to be enslaved and forced to work and perform tasks.

Acquiring slaves[edit]

Slaves can be created by reducing the will of a prisoner to zero, or by attempting to enslave a prisoner while benefiting from a recruitment inspiration. A prisoner's starting will is usually much lower than their resistance (which would recruit them as a colonist).

Summary[edit]

Slaves are controllable pawns, much like a colonist. They have many functional differences but act just the same. Slaves are prone to slave rebellions.

Slaves contribute 75% of the raid points of an equivalent colonist.

Work[edit]

A slave will have 85% Global Work Speed - they have no motivation to work as hard. To compensate, they have no need for Recreation, and will have increased mood through expectations.

Slaves are unable to do the Warden, Art, or Research tasks. They are additionally unable to:

  • Tasks that require a minimum Intellectual skill greater than 0 such as crafting Medicine as slaves are considered to have 0 skill regardless of their actual skill level prior to enslavement. Despite Drug Synthesis Speed scaling with Intellectual they are still capable of doing tasks that use this stat for scaling, albeit slowly.
  • Request caravans, military aid, or persona core location via comms console
  • Call royal permitsContent added by the Royalty DLC
  • Be an ideoligious role

However, slavery overrides all other work exceptions. For example, if a colonist would be unable to do Dumb Labor, enslaving will force them to allow Dumb Labor.

Unlike prisoners, male slaves can fertilize embryos.Content added by the Biotech DLC

Expectations[edit]

Slaves do not have the default expectations of colonists. Instead they have unique expectations with a generally higher mood boost. Slave expectations replace colonist expectations based on what the pawn's expectations would be if they were a colonist based on colony wealth and noble status.

Expectation Mood Effect Replaces Colonist Expectation
Destitute slave expectations +46 Extremely low expectations
Poor slave expectations +40 Very low expectations
Meager slave expectations +34 Low expectations
Slave expectations +28 All other Expectations

Relationships[edit]

  • Slaves never insult or social fight with non-slave pawns. They are half as likely to social fight within themselves.
  • Slaves cannot share a double bed with non slaves colonists, even if they are married.
  • Slaves can share bedrooms with colonists, however the colonists will receive −3 mood for doing so (unless they are in a relationship).

Other colonists will see slavery as either an abhorrent or honorable act, depending on the Slavery precept.

Slave rebellion[edit]

Slaves will occasionally rebel, staging something similar to a prison break. Slaves will turn hostile and uncontrollable, and will try to find weapons to attack nearby colonists. The rebellion interval is based on mood, suppression, proximity of weapons, escape route, and the presence of colonists on the map, with a base interval of 45 days. The time displayed is based on time awake - that is, if a slave sleeps 8 hours of every 24, the actual mean time between rebellions will be 50% longer. A displayed MTB of 2 years will actually be a MTB of 3 years.

Slave rebellions come in several different types: Grand, Local, and Single. A grand escape involves every valid slave on the map rebelling, while a local escape chooses a given slave as a locus with any valid slaves within 35 tiles also rebelling. A single rebellion is, as the name implies, a rebellion by a single slave.

Only non-downed, non-mental breaking, awake, slaves can join a rebellion. Thus, by assigning slaves different shifts, the maximum number of slaves rebelling can be limited.

Weapons such as Wood, EMP grenades/launchers, and Smoke launchers will not increase rebellion chance, despite being weapons. Rebellious slaves will take ranged weapons even if equipped with shield belts, dropping the belts in the process.

Mean Time Between Rebellions = 45/(Moving Factor * Suppression Factor * Slave Count Factor * Mood Factor * Room Edge Factor * Weapon Factor * Unattended Factor)

Where:

  • Moving Factor = A curve dependent on the current Moving capacity of the slave, defined by 3 points and linearly interpolated between them. 0.01x at 0% (though note that a pawn that cannot move is not valid for a rebellion anyway), 0.5x at 50% and 1x at 100%. This very closely approximates a straight scalar based on the Moving capacity, but is slightly different. Also note that this is Moving capacity, not move speed, so slowing a pawn down with peg legs will make rebellions less frequent, but slowing them down with a flak vest will not.
  • Suppression Factor = A curve dependent on the current suppression value of the slave, defined by 4 points and linearly interpolated between them. 5x at 0%, 1.5x at 33.3%, 1x at 50%, 0.25x at 100%.
  • Slave Count Factor = A curve dependent on the number of slaves loaded on a map, defined by 5 points and linearly interpolated between them. 1x at 1 slave, 0.75x at 2 slaves, 0.5x at 5 slaves, 0.3x at 10 slaves. 0.2x at 20 slaves. Note that despite making each slave individually less likely to rebel, having more slaves rolling for rebellions actually increases the chance. Also note that these slaves don't need to be valid slaves for a rebellion, they must simply be alive and on the map.
  • Mood Factor = A curve dependent on the mood of the slave, defined by three points and linearly interpolated between them. 1.5x at 0% mood, 1x at 50% mood, 0.8x at 100% mood.
  • Room Edge Factor = 1.7 when in a room that touches the map edge including being completely outdoors. 1 otherwise.
  • Weapon Factor = 4 when within 7 tile range of a usable weapon, or if indoors (in a room not considered outdoors) in the same room as a usable weapon. 1 otherwise.
  • Unattended Factor = 20 when on a map without a colonist that is not downed, dead or a slave. 1 otherwise.

Wardening[edit]

Like prisoners, slaves can be interacted with by colonists with the Warden task.

  • Suppress - Intimidate the slave, causing their suppression to rise up, which lowers the chance of rebellion.
  • Imprison - Arrest the slave, turning them back into a prisoner. You will need to reduce their will again to enslave them again.
  • Emancipate - Free the slave. If the slave belonged to another faction, you will gain goodwill with that faction.
  • Execute - Kill the slave.

Suppression[edit]

Suppression is one of the stats used to calculate the slave rebellion interval. The higher the suppression, the longer the expected interval in between rebellions. The suppression of a slave can be increased by interacting with them, melee attacking them with a colonist or executing other slaves or prisoners. Over time, the suppression level lowers depending on its current level by up to 20% per day.

Suppression Suppression loss
(per day)
30% - 100% −20%
>15% - <30% −10%
0% - 15% −5%

The amount of suppression lost can be increased or decreased if the slave is wearing the following things:

Item Suppression loss offset
(per day)
Slave collar +15%
Slave body strap +15%
Cowboy hat −5%
Bowler hat −5%
Tribal headdress −10%
Veil −10%
Marine helmet −10%
Duster −5%
Marine armor −30%
Prestige marine helmet Content added by the Royalty DLC −10%
Prestige marine armor Content added by the Royalty DLC −30%
Grenadier armor Content added by the Royalty DLC −30%
Eltex shirt Content added by the Royalty DLC −20%
Eltex vest Content added by the Royalty DLC −20%
Eltex robe Content added by the Royalty DLC −20%
Formal shirt Content added by the Royalty DLC −10%
Corset Content added by the Royalty DLC −10%
Formal vest Content added by the Royalty DLC −10%
Prestige robe Content added by the Royalty DLC −20%
Ladies hat Content added by the Royalty DLC −5%
Top hat Content added by the Royalty DLC −5%
Coronet Content added by the Royalty DLC −20%
Crown Content added by the Royalty DLC −30%
Stellic crown Content added by the Royalty DLC −30%
Beret Content added by the Royalty DLC −5%

A suppression loss of less than 0% per day will not increase the suppression. Since the default loss is at a maximum of 20% per day, a slave collar combined with body straps is enough to keep up the suppression of a slave unless they are wearing apparel that increases suppression loss above 10%. Since a negative loss has no effect, increasing Terror while slaves wear slave collars and body straps is useless unless you also wish to outfit the slave with suppression-decreasing apparel, such as dusters in hot biomes or marine armor for combat slaves.

Warden suppression[edit]

Each time a warden suppresses a slave, it increments their suppression by a value dependent on the Suppression Power of the warden and the current suppression of the slave. Namely:

Suppression Change = Suppression Power * Suppression Curve Factor
CurrentSuppressionFactorCurve

For example, a colonist with Social skill of 10 has a Suppression Power of 28%. A slave with a current Suppression value of 0 has a suppression curve factor of 2x. Thus, that colonist suppressing that slave would result in the slave's suppression increasing by 56%. This also means that a skill 20 pawn will always fully supress a slave.

Each suppression attempt takes 180 ticks (3 secs) of work.

Authority caps improve the suppression power of the wearer. See that page for details.

Melee suppression[edit]

Any colonist can suppress a pawn by performing melee attacks against them. Each attack increases suppression at a rate dependent on the current suppression and the damage dealt, with more damage suppressing more

Terror[edit]

Terror is a way to keep slaves suppressed. It rises when the slave spends time near terrifying things like terror sculptures. A slave can only be affected by three terror sources at a time. While terror is high, suppression falls slower.

Terror can be created by having slaves in proximity to terror creating furniture like skullspikes, terror sculptures or bodies in cages. While slaves are affected by these, their suppression loss is lowered, depending on the value and amount of terror sources, but capped at 3 individual sources.

Analysis[edit]

Keep slaves in collars and straps. Barring that, build terrorizing furniture in the areas they spend the most time awake in, such as workshops and kitchens. Terror fixtures are of little use inside a slave's own room.

Keep your weapons inside a room that slaves will rarely, if ever, approach; confining your slaves to a restrictive allowed area helps, of course.

Minimize or eliminate the time slaves have access to the map edge. Consider walling off the area that slaves live in, if your entire colony isn't walled off already (doors count as barriers for purposes of map edge access for slaves). If that isn't feasible, keep slaves near the center of your colony as much as possible, and build walls and doors blocking off the ends of alleyways (this also helps slow down raiders that get past your outer defenses or land inside your base outright). Again, confining slaves to an allowed area is critical.

Consider keeping your slaves happy. This is much easier than it might seem, since slaves have a huge baseline mood boost compared to a typical colonist, and will never get upset about lack of recreation. Slaves also get mood bonuses from performing work they're passionate about; paradoxically, these bonuses can last longer because the slave need not take recreation breaks. Having them drink psychite tea every other day will not only boost their mood further but also slightly increase their productivity (though unfortunately the big increase to recreation is wasted). Because slaves return to their rooms by default when in need of medical care, consider making their floors steel tile for an admittedly expensive increase to both cleanliness and room beauty. Also consider sticking "hand-me-down" beautifying sculptures in their rooms instead of just selling the old art. On the other hand, ascetic slaves allow you to have a happy slave with the crummiest room possible. Masochist slaves will love having a mindscrew implant (though it will lower their sale price), and the pain will lower consciousness, reducing their movement potential and further discouraging rebellion. Or just punch them once in a while. They also like wearing the collar and straps that all slaves should wear anyway. Not only do happy slaves rebel a bit less often, joyful slaves can benefit from inspirations as other colonists do, making them even more useful as your property.

If you have the Royalty DLC, consider giving slaves brain implants that cause brain shock so rebellions can be safely suppressed with no loss of life, even with armed and armored slaves, by using EMP weapons. Implants such as the circadian half-cyclerContent added by the Royalty DLC and the circadian assistantContent added by the Royalty DLC also increase the total productivity of the slave, and the half-cycler reduces movement capacity by reducing consciousness; the downside is that these implants increase time awake, lowering the MTB for rebellions.

Wimps also make for easily quelled rebellions.

Titles[edit]

Slaves can be given honor and ascend the ranks of royalty just as every other pawn can. They function much the same as other nobles, requiring specific clothes, certain standards of bedroom and throne room, etc. with two major exceptions. First is they cannot use permits. Second is that slavery overrides the work type restrictions from conceited nobility.

Version history[edit]

  • Between 1.2.2723 and 1.3.3087 - Slave sold penalty reduced from -5 to -3.
  • 1.3.3072 - Tune slave rebellion chances a bit lower, and reduce the effects of some factors. Slave weapon noticing distance reduced from 10 to 6.9. Couples made of a slave/colonist pair no longer want to sleep together despite not being able to share a bed.
  • 1.3.3074 - Slaves no longer slight or insult non-slaves, Slaves never start social fights with non-slaves if insulted, Meleeing a slave now increases suppression, Rebellion chance per slave now relates inversely to the number of slaves on the map, so overall rebellion chance shouldn't climb so aggressively with higher slave counts, Adjust slave rebellion base MTB 50 days back to 45 days. Ideoligion funerals are no longer expected for slaves. Slaves no longer count for Diversity of Thought. More selective in which weapons increase rebellion chance - now excludes Wood, EMP, Smoke etc.
  • 1.3.3076 - Added Alert for likely slave rebellion.
  • 1.3.3080 - Rebelling slaves now drop shield belt if they have a ranged weapon
  • 1.3.3087 - Lower slave social fight chance by 50%. Killing a slave in a slave rebellion no longer causes 'Witnessed ally's death' thought.
  • 1.3.3117 - Fix: Wardens stop suppressing slaves if suppression > 50%. Fix: Selling prisoners doesn't trigger negative thoughts on selling to slavers.
  • 1.3.3200 - Slaves are now worth 75% of colonists in terms of map wealth and population.
  • 1.4.3555 - Fix: Enslaving a pawn removes unwaveringly loyal.
  • 1.4.3682 - Fix: Slaves freed on exiting map.