There is 1 cop, he tells the robbers what to do, anything from making them go to the mess hall to eat, to going to the showers. The robbers must obey and do as he says, or be punished. However, while doing so, the robbers must also find the way to escape without the cop getting too suspicious.
When you are the cop, do not just kill everyone for no reason, that ruins the fun.
When you’re the cop, don’t keep the robbers in their cells, let them shower and eat as other stuff, otherwise, that ruins the fun.
Do not destroy and part of the map.
Don’t be a dick.
Play in a skype call/teamspeak, with no communication you basically break the map