The player mats included with the box set are a player aid, and while not necessary to play Top Secret NWO, they can speed play by making it easier to grab the dice you need during the game.

The player mats can be used with a dry erase pen and wiped clean. During the game, write the die types used for each attribute, tradecraft score, or asset, and keep the dice on your player mat in the appropriate space so you can quickly grab the ones you need.