You arrive in the public lobby with everyone online. Step into the glowing circle in front of a lobby: when enough people stand in it, the match starts.
One player is the Killer. Everyone else is a Survivor.
Survivors: run, climb and stay alive. With a minute left the gates open. Reach one to escape.
Killer: a hit knocks a survivor down. They bleed out unless a teammate stands next to them to revive them. Waiting near a downed survivor pauses their bleeding, so keep hunting.