All munchkin sets can be played with each other but expansions work best with the main/deluxe sets they are related to.
You wanted more Munchkin, so here it is! Created by Steve Jackson and illustrated by John Kovalic...
Munchkin 3 - Clerical Errors has 112 more cards for the best-selling game of killing monsters and taking their stuff. Play a new race: Gnomes! Try on the Bard class. Face the Tequila Mockingbird, the Bad Ass, and the dreaded Auntie Paladin! Equip yourself with amazing items like the Chainmail Bikini and the Stab-A-Matic... and show them who's the mightiest, munchkinest dungeon delver of them all.
And this set has a special treat. We asked five of our favorite Comic Guys to do one card each. So in this set you'll find: Phil Foglio's Magnificent Hat Pete Abrams' Perfectly Ordinary Rabbit Tom Ricket's Stick Figure Jon Rosenberg's Fowl Fiend and Randy Milholland's Redneck Tree!
Munchkin 3 - Clerical Errors is a supplement to Munchkin; you will need the original game to play. Or you could add it to a game of Munchkin, Munchkin Fu, or Munchkin Bites! instead, or mix them all together for a Munchkin-fest of truly mind-bending proportions!