Terrain represents the different land features and barriers inside expedition maps. Passable terrains deplete sanity to travel across: more difficult or treacherous terrain costs more sanity. Any travel leg has a base cost of 5 sanity (10 in hardmode) plus the costs associated with each hex's terrain type. Hovering over terrain reveals its type, and potential routes display their costs when charting course.
Tools & Expertise Edit
Some items and perks can stack effects to greatly reduce the sanity travel cost for certain terrains. The following table indicates these particular terrains and the items/perks that affect their cost.
|Deep Snow||Snowshoes||Arctic Explorer|
|Hills & Plateaus||Climbing Gear||Climber|
|Thick Jungle||Machete||Jungle Explorer|
Passable Terrain Edit
*cost may be reduced by terrain-specific item or perk.
Hazardous Terrain Edit
|Fire||Each hex of fire traveled on costs -10 Sanity, and may cost items and kill companions.|
|Fumarole Gas||Each hex of gas traveled on costs -10 Sanity, and may cost items and kill companions.|
|Geyser Water||All shallow water surrounding a geyser will periodically be drowned, potentially "washing away" the group, costing -10 Sanity and several items.|
|Mosquito||Afflicts one or more characters with the Malaria ailment.|
Impassable Terrain Edit
|Arctic Sea||Swallows up Pack Ice after the party travels across. Travelling in the dog sled prevents this.|
|Chasm||The chasm shrine curse will expand outward, instantly killing the party if they don't flee fast enough.|
|Fumarole||Periodically erupts, engulfing the surrounding area in toxic fumes that can poison the group, stealing sanity and potentially wounding or even killing companions.|
|Geyser||Periodically erupts, drowning the surrounding Shallow Water and potentially "washing away" the group, losing sanity and items.|
|Mountain||The mountain shrine curse will sprout dozens of impassable mountains, potentially blocking routes and even destroying locations. Can be blown up with dynamite, costing 1 Standing|
|Magnetic Mountain||Causes the compass to point towards it instead of the pyramid if the party travels close enough. Can be blown up with dynamite, eliminating its effect. (costs -1 Standing)|
|River||The river shrine curse will spread outward, following the group for several days. Permanently impassable and can potentially even drown the group.|
|Sulfur Lake||Always impassable. Cannot be removed.|
|Void||The void shrine curse will spread endlessly outward, eventually swallowing the entire map and potentially killing the group.|
|Volcano||Periodically erupts, engulfing the surrounding area in fire that steals sanity, items and can wound and even kill companions.|
- Plateaus and hills have the highest base sanity cost, but only to climb up them. It costs only 1 sanity per hex to travel along their peaks.
- The Impetus perk reduces the base travel cost of all travel legs from 5 to 4.
- Remember that the effects of items and perks can stack to reduce even more travel cost.