Agency missions advance the story and are the game's main campaign faction missions task players to assist the game's three factions, and stronghold missions task players to infiltrate government bases and liberate them for the factions. To advance through the campaign missions a player must earn chaos points, a progression system introduced in the game. Just Cause 2 is a third-person action-adventure game in which players control Rico Rodriguez, field operative of the Agency, in an effort to overthrow the island dictatorship of Panau: an open world for players to explore.