Game Knight is a term used to describe someone who enjoys playing video games. The term can also be used to refer to someone who is an expert in the field of gaming. The crossword solution for the term Game Knight is 'JOUST, ' which is a type of medieval combat game that was popular during the Middle Ages. Jousting was a sport in which two opponents would ride horses and attempt to knock each other off their mounts with lances. It was a popular form of entertainment in Europe during the Middle Ages, and it has been adapted into various video games over the years.