I've assembled various behaviors from the RPG Platformer Kit, selected the ones that, by themselves, could be useful to introduce RPG elements in other games. Thus, the "RPG Elements" Resource Pack was uploaded on Forge.
-Health: to know remaining hit points of an actor.
-Draw Health: draws current health on screen.
-Energy: for use in skills as a cost to use them.
-Draw Energy: draws current energy on screen.
-Damage Type Modifier: to modify the damage received from certain types.
-Experience: experience required for leveling up and character leveling.
-Draw Experience: draws current experience on screen.
-Character Status: attributes of the actor in each level. By default, Strength, Vitality, Inteligence, Wisdom, Luck, Health and Energy.
-Status Condition Poison: damage over time, also a template for other status conditions.
-Equip Weapon: configure your actor's weapons with various parameters, and set wich to equip.
-Equip Armor: configure your actor's armor with various parameters, and set wich to equip.
-Combat Statistics: combine Character Status and Equip Weapon/Armor to set attributes, such as minimum damage and magic defense.
-Inventory: handles adding and removing items for an actor, as well as configuring the amount of items he can carry.
-Save Status: store as many attributes for you actor as you want inside a game attribute list. Automatically saves upon exiting a scene, and loads when entering a scene.