An idea I have thought of is that the game would be a survival type. The cop team has to live longer than the robber team and vice versa. The robbers and the cops may shoot each other to kill each other, and both teams will be attacked by zombies as well. Players could either be dead until the end of the round, or they could become a zombie themselves and attack both sides until the round is over. Once all of 1 team is dead, the other side wins, and then the round restarts with everyone alive again in a continuous loop, and people can leave as they want to. Cops would receive cash by killing zombies (and therefore protecting the city), and robbers would receive money by stealing abandoned vehicles and taking them to the chop shop, and killing civilians that have barricaded themselves for protection from zombies (behind a destructible wall or in a building). There would be no AI cops in this mode, or combat aids for the police. What does everyone think?