Apocalypse Weekend — Postal 2:

Postal 2: Apocalypse Weekend is a 2004/2005 expansion for Postal 2 by Running With Scissors, featuring a more linear, combat-heavy narrative that follows the Postal Dude through a zombie outbreak and a destroyed town. The expansion introduced enhanced gore, melee weapons, and boss battles, earning mixed reception due to its departure from the open-ended style of the base game. Further details are available on the Postal Wiki .