Tis the season for Spys and Spitters! These festive holiday cards, from Valve’s online store, come in sets featuring characters from one of three games: Left 4 Dead, Left 4 Dead 2, or Team Fortress 2. Each $15.95 set includes 10 5″ X 7″ cards, 10 small envelopes, and one large envelope. All ten cards feature a separate design in their respective theme and an ambiguous, non-religious holiday greeting on each card. Get ‘em while they last!

ValveStore
via Joystiq