Rules Index | GM Screen | Player's Guide

Chapter 10: Game Mastering / Environment


Source Core Rulebook pg. 516 2.0
Underground environments consist of caves and natural underground areas. Artificial dungeons and ruins combine underground features with urban features like stairs and walls. Deep underground vaults have some of the same terrain features as mountains, such as chasms and cliffs. The most common disasters underground are collapses.


Source Core Rulebook pg. 516 2.0
Natural underground environments rarely have flat floors, instead featuring abrupt changes in elevation that result in difficult terrain, uneven ground, and inclines.


Source Core Rulebook pg. 516 2.0
Ledges are narrow surfaces that overlook a lower area or provide the only means to move along the edge of a chasm. Moving across a narrow ledge requires using Acrobatics to Balance.


Source Core Rulebook pg. 516 2.0
Caverns can be covered in rubble, which is difficult terrain. Deep or pervasive rubble is also uneven ground.

Stalagmites and Stalactites

Source Core Rulebook pg. 516 2.0
Stalagmites are tapering columns that rise from the floor of a cave. Areas filled with stalagmites are greater difficult terrain, and especially large stalagmites have to be sidestepped or Climbed. Stalagmites can be sharp enough they can be used as hazardous terrain in some circumstances, as can stalactites (icicle-shaped formations that hang from the roof of a cave) if they’re knocked loose from a ceiling or overhang.


Source Core Rulebook pg. 517 2.0
Natural cave walls are uneven, with nooks, crannies, and ledges. Since most caves are formed by water, cave walls are often damp, making them even more difficult to Climb.