Colony Sim Guide: RimWorld and the Art of Disaster Management

RimWorld is a colony management simulator where three crash-landed survivors must build a settlement, survive hostile environments, and eventually escape the planet. The AI Storyteller generates events — raids, plagues, solar flares, mental breaks — that create emergent narratives. Every colony tells a unique story of triumph, tragedy, and occasionally cannibalism.

Starting Your Colony

Location selection: temperate forest biomes on flat terrain provide the most forgiving start. Year-round growing seasons mean consistent food. Forests provide wood for construction. Mountains provide defensible killboxes. Avoid extreme biomes (ice sheet, desert, tropical rainforest) until you understand the core systems.

First priorities: roof over heads, food production, and defense. Build a barracks (shared sleeping room), a kitchen with a butcher table and stove, and a stockpile zone. Grow rice for fast food production and potatoes as a staple crop. Hunt wildlife for immediate meat. Build a perimeter wall with a single entrance to funnel raiders.

Colonist skills matter: check each colonist’s skills before assigning work. A colonist with 0 in Cooking produces food poisoning. A colonist with high Construction builds faster and with better quality. A colonist incapable of Violence cannot fight raiders. Assign work priorities using the manual priority system (numbers 1-4, where 1 is highest priority).

Base Layout

Killbox design: funnel raiders through a single entrance into a winding corridor lined with sandbags and turrets. Your colonists shoot from behind cover at the corridor’s end. The narrow path prevents raiders from flanking. Add traps (deadfall traps, IED traps) in the corridor for additional damage before raiders reach your shooters.

Temperature management: build double-thick walls on your freezer and connect two coolers venting heat outside. Set cooler temperature to -5C for food preservation. In extreme cold biomes, heaters in every occupied room prevent hypothermia. In hot biomes, coolers in bedrooms prevent heatstroke during sleep.

Hospital placement: build a sterile tile hospital near your base entrance. Colonists wounded in combat need immediate treatment. Medicine cabinets nearby reduce treatment time. A skilled doctor with good medicine prevents infections that kill colonists after surviving combat.

Recreation: build a horseshoe pin, chess table, and telescope. Colonists need recreation variety; the same activity loses effectiveness over time. Four different recreation sources prevent the “need recreation variety” debuff that leads to mental breaks.

Combat and Defense

Weapons: assault rifles are the reliable workhorse for most colonists. Charge rifles deal more damage but are expensive. Sniper rifles excel at long-range engagements before enemies reach your killbox. Melee weapons (longswords, maces) work on high-melee colonists who can intercept enemies that breach your ranged line.

Armor: flak vests protect the torso from bullets. Helmets protect against headshots (the most common instant-kill location). Marine armor provides the best protection but requires advanced research and rare components. Equip your front-line fighters first.

Psycasts (with Royalty DLC): psionic abilities like Skip (teleports a target), Berserk (turns an enemy against their allies), and Invisibility provide powerful tactical options. Focus grants bonus consciousness that improves all activities. Psycasts require meditation and neural heat management.

Advanced Economy

Drug production is the most profitable industry. Producing and selling beer, smokeleaf joints, and psychite tea to trade caravans generates consistent silver income. Avoid addictive drugs for your own colonists (set drug policies to restrict usage).

Art production: colonists with high Art skill produce sculptures that sell for thousands of silver. Masterwork and legendary sculptures are the most valuable trade goods in the game.

Component manufacturing: components are the bottleneck resource for advanced construction. Build a fabrication bench to manufacture components from steel and plasteel rather than relying on trade and mining.

The Storytellers

Cassandra Classic escalates difficulty steadily. Events grow more challenging over time at a predictable pace. Best for learning.

Randy Random generates events of random severity at random intervals. You might face three raids in a week or have months of peace. Best for experienced players who want unpredictability.

Phoebe Chillax provides long peaceful stretches between events but hits hard when events occur. Good for players who want more building time between crises.

For more colony management, see our City Builder Strategy Guide and Survival Strategy Game Tips. For tactical combat, check XCOM 2 Tactical Guide.