State of Emergency offers many modes of play including Chaos, Revolution, and Multiplayer. Chaos Mode offers fixed time, unlimited time, and last clone standing games, and is a fun and mindless way to spend one's time. The objective is usually just to kill enemy forces or destroy property, and it's all very visceral and is generally entertaining.
Revolution Mode presents what seems like a countless number of small missions, each presented one after another. There's little background story, and this is really just Chaos mode wrapped in a progressing campaign. Split-screen multiplayer games include Chaos, Last Clone Standing and Deathmatch, and are available for up to four players.
Revolution Mode is the heart of State of Emergency, and it offers several different mission types, from the basic 'kill this' and 'guard that' variety, to such activities as destroying property, retrieving objects, or meeting up with allied characters. All sorts of power-ups are available, and weapons like clubs, knives, guns, and grenades can be found throughout the levels.
There are a number of playable characters in the game, each with their own unique look and fighting styles. Two characters are available immediately, and an additional three can be unlocked by completing levels in Revolution Mode.