RIP Yoshihisa Kishimoto, Creator of the Beat 'em Up Genre
It's always sad when a game developer dies, but especially so when that person is the founder of an actual genre. Yoshihisa Kishimoto is just such a person. He created the Kunio-kun/River City and Double Dragon franchises, and as such, is considered the father of the beat 'em up genre. Double Dragon was instrumental in popularizing cooperative multiplayer, so his influence even extends beyond the genre that he created. Lamentably, Kishimito died on April 2, as reported by his son.