Zpocalypse introduced the mechanics of Quick Play Rules with the 'Day Zero' Scenario. Numerous scenarios within Zmergency are played using these mechanics and provide a shortened game play experience for those looking for some quick and dirty combat.
The Quick Play Scenario is a Combat Phase only game that ignores all other Phases. The map is expanded in a different manner than the Main Game Scenario. You start with just one tile (determined by the Scenario being played), and on each turn you may walk off the board and place a new tile. In Zpocalypse, players roll a die to determine how many zombies spawn on that tile. Zmergency Rules differ in that they utilize the deck of Encounter Cards.