AI Storytellers

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Basics Menus Game Creation Gameplay Pawns Plants Resources Gear Mods
Game Creation Scenario system AI Storytellers World Generation Biomes
AI Storytellers Cassandra Classic Phoebe Chillax Randy Random

The AI Storyteller creates events like pirate raids, resource drops, or animal attacks. Storytellers will never entirely disallow events because of population. Their choices will affect the story of your colony.

Gameplay is driven by AI (Artificial Intelligence) Storytellers. The AI Storyteller that you choose will make decisions about what events it wants you to encounter and when, based on the situation you are currently in and on the biases of that particular AI.

Choosing an AI will have a great influence on the narrative that is formed as you play. Difficulty is selected separately from the Storyteller but both are changeable mid-game.

Current AI Storytellers

Cassandra Classic


Cassandra Classic is the standard storyteller for Rimworld, giving the game a gentle slope for the player to warm up to as the enemies, the challenges, and the events continue to progressively increase in difficulty. Starting from minor, low-count maddened animal events to major, high-count, heavily armed raids, Cassandra is a learning player's preferred storyteller. Despite her ability to bring strong forces, she also rewards the player with plenty of resources via drop pods.

The essence of good storytelling is the perfect progression of an intensifying struggle.

Phoebe Chillax


Phoebe Chillax is a friendly AI that allows for successful base building. If she chooses a challenge to be presented to the colony, it will generally be a smaller threat than an AI such as Cassandra. By choosing Phoebe and setting a low difficulty, you can get closest to a true builder mode.

Randy Random


Randy Random is the wildcard AI. Any AI event could be triggered at any time with Randy. You may encounter insanely good trade deals, or you may find yourself faced with a raid during a storm while there is an eclipse as your power generator explodes, and your military members go insane. For those looking to ultimately lose to chaos among their attempts at order a la Dwarf Fortress, Randy Random may be the AI Storyteller for you.

Challenge Scale

When the storyteller sends threats after you, they will set percentage as large as in Intense mode (the default difficulty).

Flashstorm, toxic fallout and volcanic winter are disabled in Base builder difficulty.

Name Threat scale Colonist mood bonus Base sell price multiplier Crop yield multiplier Disease interval multiplier Enemy reproduction rate factor
Peaceful 0.05 +10 1.00 1.3 3 0.1
Base builder 0.10 +10 1.00 1.3 3 0.1
Some challenge 0.35 +5 0.95 1.2 1.5 0.4
Rough 0.65 0 0.90 1.0 1.0 1.0
Intense 1.00 -3 0.85 1.0 1.0 1.0
Extreme 1.30 -8 0.80 0.9 0.9 1.0

Permadeath Mode

Permadeath mode is an option, off by default, when selecting difficulty.

In permadeath mode, you only get one save file and can only save when quitting the game. You cannot reload the game to fix mistakes, and only when the colony dies, that's it.

This is the way RimWorld was meant to be played with every dramatic turn - whether tragic or hopeful - played out to full impact.