Codenames Duet XXL Card GameCodenames Duet keeps the basic elements of Codenames give one word clues to try to get someone to identify your agents among those on the table but now you're working together as a team to find all of your agents. (Why you don't already know who your agents are is a question that Congressional investigators will get on your back about later!) To set up play, lay out 25 word cards in a 5A 5 grid. Place a key card in the holder so that each player sees