Crusader Kings III 1.20.1.2
Terrain types
Every terrain of the map as the game files set it: how fast armies cross it, how wide battles are, what defenders gain, how it changes supply and a county's development — and how many baronies and county capitals have it.
Crusader Kings III 1.20.1.2 has 15 land terrain types and 2 sea ones; the commonest county capital terrain is Plains (702 counties); defenders get the most advantage in Mountains and Desert Mountains (+12); armies move slowest (50%) in Mountains, Desert Mountains and Jungle. Patch 1.20.1.2, from game/common/terrain_types and common/province_terrain.
This section as JSON: /raw/terrain.json
Land terrains (15)
PlainsMovement 100%Width 100%702 county capitals
FarmlandsMovement 100%Width 100%Development +20%103 county capitals
HillsMovement 80%Width 80%Defender +5Development -10%636 county capitals
MountainsMovement 50%Width 50%Defender +12Development -25%400 county capitals
DesertMovement 70%Width 100%Development -50%201 county capitals
Desert MountainsMovement 50%Width 50%Defender +12Development -50%71 county capitals
OasisMovement 100%Width 100%Development +10%42 county capitals
JungleMovement 50%Width 70%Defender +6Development -40%171 county capitals
ForestMovement 80%Width 90%Defender +3257 county capitals
TaigaMovement 80%Width 80%Defender +4Development -5%199 county capitals
WetlandsMovement 70%Width 60%Defender +5Development -25%88 county capitals
SteppeMovement 100%Width 100%Development -50%132 county capitals
FloodplainsMovement 100%Width 75%Development +20%73 county capitals
DrylandsMovement 100%Width 100%Development -5%360 county capitals
Terraced HillsMovement 80%Width 80%Defender +5Development +10%41 county capitals
Side by side
| Terrain | Movement | Combat width | Defender advantage | Supply limit | Development growth | Provisions | Travel danger | Fertility | Baronies | County capitals |
|---|---|---|---|---|---|---|---|---|---|---|
| Plains | 100% | 100% | — | — | — | 50 | 10 | 30 | 2,059 | 702 |
| Farmlands | 100% | 100% | — | +50% | +20% | 25 | — | 40 | 243 | 103 |
| Hills | 80% | 80% | +5 | -10% | -10% | 50 | 45 | 20 | 2,182 | 636 |
| Mountains | 50% | 50% | +12 | -50% | -25% | 150 | 65 | 15 | 1,372 | 400 |
| Desert | 70% | 100% | — | -30% | -50% | 150 | 50 | 20 | 788 | 201 |
| Desert Mountains | 50% | 50% | +12 | -60% | -50% | 150 | 65 | 20 | 304 | 71 |
| Oasis | 100% | 100% | — | +10% | +10% | 25 | 10 | 30 | 53 | 42 |
| Jungle | 50% | 70% | +6 | -25% | -40% | 100 | 65 | 10 | 620 | 171 |
| Forest | 80% | 90% | +3 | -10% | — | 50 | 45 | 15 | 944 | 257 |
| Taiga | 80% | 80% | +4 | -20% | -5% | 100 | 55 | 15 | 623 | 199 |
| Wetlands | 70% | 60% | +5 | -25% | -25% | 80 | 65 | 20 | 320 | 88 |
| Steppe | 100% | 100% | — | — | -50% | 80 | 50 | 30 | 372 | 132 |
| Floodplains | 100% | 75% | — | +35% | +20% | 25 | 35 | 30 | 205 | 73 |
| Drylands | 100% | 100% | — | — | -5% | 80 | 35 | 25 | 1,107 | 360 |
| Terraced Hills | 80% | 80% | +5 | +10% | +10% | 50 | 45 | — | 105 | 41 |
 Sea | 100% | 100% | — | — | — | 100 | 20 | — | — | — |
 Coastal Sea | 100% | 100% | — | — | — | 80 | 20 | — | — | — |
A land province not listed in common/province_terrain is Plains (default_land). A county's capital is its first barony. Which regiments fight best on each: best men-at-arms by terrain; counties by holdings and development: best counties.
Source: game/common/terrain_types/00_terrains.txt, game/common/province_terrain/00_province_terrain.txt, game/common/landed_titles, game/common/event_backgrounds (terrain, wilderness) and the English localisation, Crusader Kings III 1.20.1.2.