With the new additions, here are new recommendations to go along with them.
POSTAL 2: Paradise Lost Easily one of the best expansion packs of the last several years. Paradise Lost really shows a love of the base game, between the return of the open world to some of the best humor in the entire Postal series. It is moreorless like the base POSTAL 2 game (see my review here:
https://www.gog.com/forum/general/the_community_giveaway_steam_edition/post4135), so get that along with Paradise Lost if that's what you're after. Overall, a very fun and funny game for open world fans and psychopaths alike.
Cthulhu Saves The World If that title made you laugh, then get this game now. As a comedy about Cthulhu being a hero, the game is a real riot, containing great dialogue and jokes, including some Lovecraftian fans will not want to miss. As a loving tribute to the role-playing games of gaming past, Cthulhu Saves The World provides hours of fun content that combines some of the best elements of classic role-playing. Add in plenty of replay value with alternate modes and this game really is worth playing.