For Co-Op Classics today, we dig into the treasure trove of co-op games released in arcades in the 90s.  Sunset Riders came fairly early on, being released in 1991.  It was ported to the SNES and Genesis as well.  Sunset Riders is a charming game, for sure.  The art is bright and colorful, the characters are fun and unique from each other, and the gameplay has enough variety to keep things interesting.