Perhaps as a throwback to the Red and Blue back sets from 1951, Topps manufactured these Game cards in 1968, and were made available as inserts in packs of regular '68 Topps cards or through purchase as a complete boxed set. Each of the cards in the offered set sports the blue back, and overall condition of the set ranges from EX (due in most part to centering issues) to NM-MT, with most being EX-MT+/NM or better. Shuffle them up and play a simulated baseball game based on the game situations on each card, or just leave them as they are and admire the impressive array of stars and HOFers contained within.