Codenames Duet is collaborative two-player version of the game—meaning that you and another person play against the game itself. It relies on the same five-by-five grid, but in this version both players work as operatives and spymasters. Instead of a one-sided legend, the card features a grid on either side, one for each player, with a different pattern of green and black tiles. There are nine green words for each player to guess, three of which overlap—though you don’t know which ones are shared—and three black X tiles per side. You alternate between giving clues and guessing.