Most combat systems providing their players the possibility to create/build and over the time extend a role-play character.
Mostly you will find different types/races (Human, Vampire, Lycan...) and roles/classes (Warrior, Tank, DPS, Healer, Caster, Wizards, ...) with their corresponding characteristics. Whereby health, stamina and strength building the basis of most systems, beside lots of other additional attributes.
During attacks health and stamina will be decreased depending on the offenders strength. If a players health running down to 0, this one is considered as defeated which has/should have impact into the following role-play.
Some will ask now, what for another combat system?