Unlike most horde-style modes, Guerilla requires players to manage specific zones of the battlefield and keep the enemies out. As waves progress and the enemies become more plentiful, it becomes imperative that players hunker down and defend the zone. This is in great contrast to a majority of similar modes that can often reduce to cross-map cowboy antics with players splitting up and hunting straggling mobs. The defensive zones keep players together, which is what the series has always been about. It may seem like an innocuous tweak to the formula, but when combined with the slower pace of the game, it lends to a much more thoughtful experience.