1 for MUDstyle combats . For ones I worked with mercbased it ran like that each battletick 3 seconds mobscharacters that involved in combat do a basic attack . Depending on skills it could be several strikes skills like second , third , forth attack , twohanded combat and slowhaste spell effect . As it is based on DnD system each attack goes through hitroll vs armor checks . Also there are skills like dodge , block , parry to completely evade single attack . any time character can use specific skill like lunge , bash , or any spell for caster classes . Skill puts on a cooldown , usually 1 battletick , so before it runs off you can ' t use any commands . It is pretty much realtime combat system , though actions are kinda discrete . Can be combined with graphics without any problems , can be modified to be turnbased . Still there are issues with longranged attacks , merc combat system considers that any attack can reach your enemy while both are in the same room and you can not attack anyone that is in different room .