A character may be of up to three classes, which are selected at character creation.
The character has a separately tracked count of experience points per class. When earning XP, the total earned is split evenly between the per-class XP counts.
When determining hit points at character creation or upon gaining a level, any hitpoints gained are divided by the numberof classes. Fractions are tracked and mayadd up to a whole number later on.
For example, a fighter/thief character gains a thief level and the player rolls 1d4 for hit points. The result is a 3, meaning that the character gains 1½ hit points. Upon gaining a fighter level, the player rolls 1d8 for hit points. The result is a 5, meaning that the character gains 2½ hitpoints. The half hit points gained for the thief and fighter levels add up to a whole hit point.
The character uses the best saving throw value in each category and the best attack bonus value of all of their classes.
The character may use the magical abilitie of each class without restriction.
Class abilities such as Stealth may only be used when at the encumbrance level that is allowed for the class that grants the ability.