AI Storytellers
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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
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 |
| Builder | 0.10 | +10 | 1.00 | 1.3 | 3 | 0.1 |
| Medium | 0.35 | +5 | 0.95 | 1.2 | 1.5 | 0.4 |
| Rough | 0.65 | 0 | 0.90 | 1.0 | 1.0 | 1.0 |
| Savage | 1.00 | -3 | 0.85 | 1.0 | 1.0 | 1.0 |
| Merciless | 1.30 | -8 | 0.80 | 0.9 | 0.9 | 1.0 |
Commitment Mode (Permadeath)
Commitment mode is an option, off by default, when selecting difficulty.
In commitment 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.