The Domain of Slaye
Player Characters and other heroes advance based on adventure experience. We are using the “medium” progression from the Pathfinder Core Rulebook (Table 3-1, page 30) to determine character advancement.1
For now, player characters add average hit points for the class they are advancing in (rounding up) when they go up a level.
1 — But I have to point out that this isn’t a clean mathematical progression, which makes me unhappy.