Far Cry 2, Ubisoft Montreal is taking a different kind of approach to first-person shooter narrative. The majority of the story is generated in a player's head, along the lines of something like S.T.A.L.K.E.R., but seemingly more free-from. That's not to say the game is entirely devoid of developer-generated story, but the way you interact with it is largely up to you.
According to narrative designer Patrick Redding, gameplay revolves around a player walking into towns or environmental spaces and playing two factions against each other. As the 50 square kilometer world is explored, you'll wind up taking on missions for each faction, killing NPCs, and generally affecting the game world, all of which impacts your infamy rating.