I was able to do this by triggering on behalf of all players on game start to make a counter increment by one. The counter tracks a property called “player count” and that is your player amount. If you want the count to be able to go down when somebody is knocked out, connect a knockout manager to decrement the counter when target knocked out. If you want this to work with late joining you would need to connect a repeater that repeats every half-second to reset the counter and then trigger on nehalf of all players again.