Upon first glance, Postal III looks better than any of its predecessors, probably because it's based on Valve's Source engine, which powered Half-Life 2: The Orange Box. The action remains as over-the-top as ever, though. Your character, The Postal Dude, gets to explore a whole new town (he blew up the town in Postal 2 with a nuclear bomb). Desi says that there is going to be another open-world experience in Postal III, similar to the open worlds of the Grand Theft Auto games. However, the designers are also putting in linear missions that serve as a tutorial before dropping you into the open world.