This book constitutes the refereed proceedings of the 13th International Conference on Computers and Games, CG 2026, held as a Maastricht, The Netherlands, during June 19–20, 2026.

The 16 full papers included in this book were carefully reviewed and selected from 25 submissions. They are organized in the following topical sections:  Game Analysis; Machine Learning in Games; Search and Solving; Imperfect-Information and Card Games.