Slavery

While slavery technically exists in the base game, the Ideology DLC significantly adds to the system, allowing them to work and perform tasks. Slaves in base game RimWorld can only be sold for profit, with no other use.

Core

Slavery is a quick way to get decent amounts of money quickly. Pawns will suffer a mood penalty of -3, stacking up to -15 for 4 days once slaves are sold. Unless you have a colony of psychos, selling slaves may bring down your colony by lowering the moods of pawns by large increments. There is no way to mitigate the negative moodlet. One way of dealing with this is to sell only 1-2 slaves every day in the late game, when pawns can take drugs and eat lavish meals, and avoiding slavery altogether in the early game. This has a downside, however. Traders generally only stay for around two days, and only appear occasionally, meaning that it will be hard making slavery the main source of profit for the colony. Alternatively, you can stuff all of your pawns into cryptosleep caskets or give them extra high accommodation to prepare for the massive mood debuff and have the best psychopath trader (if using the cryptosleep tactic, otherwise, use the best trader colony-wide) sell as many slaves as possible.

Ideology

Slaves are controllable, like normal colonists, but with unique mechanics and restrictions.

Pros:

No need for recreation
Slave specific expectations meaning higher base mood
Ignore all work type incapabilities except that which slavery itself adds, therefore pawns with many incapabilities can actually be more useful as slaves.
Will never insult or social fight with non-slave pawns
Half as likely to social fight.
Significantly easier to enslave than recruit
Contribute only 75% of the value of a Colonist to Raid points

Cons:

Prison rebellions
New incapabilities: cannot hunt, make art, research or warden. Slaves are also incapable of synthesizing Drugs (cooking Drugs is still possible). Currently unclear if they can do other social activities like trade.
Suffers a x0.85 multiplier to Global Work Speed which in turn reduces: Animal Gather Speed, Butchery Speed, Construction Speed, Cooking Speed, Deep Drilling Speed, Drug Synthesis Speed, Entity Study Rate, General Labor Speed, Hacking Speed, Mechanoid Shredding Speed, Medical Operation Speed, Medical Tend Speed, Mining Speed, Plant Work Speed, Pruning Speed, Research Speed, Smelting Speed, Smoothing Speed

Expectations

Acquiring slaves

Slaves can be created by reducing the will of a prisoner to zero. This is typically much faster than reducing their resistance and recruiting them, allowing faster acquisition of pawns in exchange for the conditions and effects slavery imposes.

Slave relationships

Slaves can start relationships with any other slave or even another colonist. This is troublesome, as slaves cannot be assigned to the same bed as a colonist, but can still sleep in the same room. If you want both to be together, you need to make either both slaves or both colonists.

Slave rebellion

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, and colonists present on the map, with a base interval of 45 days.

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

Suppression

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%

This value can be increased or decreased by 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	−10%
Prestige marine armor	−30%
Grenadier armor	−30%
Eltex shirt	−20%
Eltex vest	−20%
Eltex robe	−20%
Formal shirt	−10%
Corset	−10%
Formal vest	−10%
Prestige robe	−20%
Ladies hat	−5%
Top hat	−5%
Coronet	−20%
Crown	−30%
Stellic crown	−30%
Beret	−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.

Terror

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.

Authority

Authority caps do something?

Titles

Main article: Titles

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

? - Slave sold penalty reduced from -5 to -3, sometime between 1.2.2723 and 1.3.3087
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

Expectation	Mood Effect	Wealth Range
Destitute slave expectations	+46	?
Poor slave expectations	+40	?
Meager slave expectations	+34	?
Slave expectations	+25	?