There is a short series of blog articles explaining the Play Matrix thinking that starts here: https://mmitii.mattballantine.com/2019/06/26/innovation-in-4-diagrams-1-digital-architecture/

You can download the cards here:

CIO priorities 2nd edition
CHRO Priorities
CISO Priorities
Startup Priorities
CMO priorities 2nd edition

And a couple of user guides here:

CIO Priority User Guide
CHRO Priority Cards User Guide

And playboards here:

CIO priorities game boards
CHRO Priorities Game Boards

They are all available to purchase from http://stamplondon.co.uk