Postal: Special Delivery

Postal: Special Delivery adds four new levels to the single player campaign with new NPCs, improved netcode with a rebalanced multiplayer, and 4-player Co-op for the single player campaign. Storywise, there is no explanation for how the Postal Dude escaped from the asylum. Just a quote from his "War Journal" on the back cover:

"War Journal: I woke up from the strangest dream this morning...My head is pounding...Who came in here and moved around all my furniture? I'd better find out..."