SiXeS is about things that are similar and different. Play six rounds, think of six things each round. and try to predict what you will write that will match, or not match, what the other players write, depending on whether you are in a "match" round or a "unique" round.
The player with the most points after 6 rounds is the winner.
SiXeS is game #6 in the E•G•G Series from Eagle-Gryphon Games