Pairs is a "New Classic Pub Game" by James Ernest and Paul Peterson, who also brought you Unexploded Cow. It's an extremely simple press-your-luck game featuring a deck of number cards (1 x 1, 2 x 2, 3 x 3, and so on, up to 10 x 10). There is only one loser, and the object is not to score points by colelcting a pair.
Phil and Kaja Foglio are the creators of the web comic Girl Genius, along with colorist Cheyenne Wright. This Pairs deck features ten "Muses," which are ancient and powerful clanks from the Girl Genius universe. This deck also comes with the "traditional" 2-player bluffing game, Regent, along with "modern" multiplayer rules for Regent.