The Anonymous Game grew out of face to face role play games called “Matrix Games”. Here are some links if you want to learn more about those games. 

Free Engle Matrix Games 

https://sites.google.com/view/free-engle-matrix-games/home

The Matrix Game Handbook 

https://www.amazon.com/Matrix-Games-Handbook-Professional-Applications/dp/B09XZMPNW4

Social Matrix Games 

https://www.lulu.com/shop/chris-engle/social-matrix-games/paperback/product-gjneje7.html?page=1&pageSize=4

The Scientific Matrix Game 

https://www.lulu.com/shop/chris-engle/the-scientific-matrix-game/paperback/product-rmdqk8y.html?page=1&pageSize=4

30 Years of Matrix Gaming 

https://www.lulu.com/shop/chris-engle/thirty-years-of-matrix-gaming/paperback/product-yv74z77.html?page=1&pageSize=4

YouTube Videos of Engle Matrix Games 

 https://www.youtube.com/channel/UCdd-m9Sb66WJOeV2n2_OxRA?view_as=subscriber