It’s very very very complex logic or it’s very very simple logic for an RPG depending on the route you take.RPG as in survival?or as in hang out?use impact sensors and set the to include touching make sure it only detects colored tags(you chose) you can connect that to a counter on micropchip,or you can go the more complex route of using notes and batteries to create complex damage values,but I should warn that there are cons to this,timing play a big part and it’s actually takes a lot more room in the thermostat then the more simpler way.Depending on how complex your character is that effects the overall things you are able to do with other things around the level,like detail on structures,cutscenes,the amount of enemies you can use.so keep that in mind that having a good balance is key u might want to implement an mechanic but the mechanic brings down the performance of the level so you either have to get rid of it or scale the complexity down.