how to make a sentry appper when two players are left
This is a Help topic.
Have you searched?
Edit: NVM I searched
Still, please move this Help.
you could make an area only enterable when there is two people
make a zone transmit on inccounter when player enters
then make the same zone transmit on deccounter when player leaves
make a counter with a target value of two (2) and make the counter increment when receiving on inccounter and decrement when receiving on deccounter
wire counter to barrier when counter reaches target value ---> deactivate barrier
building on what @TheCatIsCrazy said, maybe have a item appear? so they can access that room but its locked until then, like using a barrier?
Apparently you have not really searched
That gives a property tracking player count, when it is two, transmit a channel(you might want to disable it for the first two seconds to prevent it activating on start)
Use a player counter that triggers a sentry to activate when the player count drops to exactly two.