Wrong section to be posting this, but also people do that using custom CV2 circuits. Chips like world UI and HUD element are used to give players a health bar and there are “on player hit” event receiver events that can be used to tell players to lower their world UI and/or HUD element value when hit. Check out some tutorials for it on Youtube 
I can’t see On Player Hit event, the only similar one I could find is Player Collision, basically when two players run into each other
Hmm… It may be beta only then
I have Beta on, and still not there, I turned it on thinking the event would exist, but nope
Oh! My bad, i think it may need to be within a collision detection volume or projectile launcher? I’ll look into it later and get back to you lol