This book constitutes revised selected papers from the 6th Workshop on Computer Games, CGW 2017, held in conjunction with the 26th International Conference on Artificial Intelligence, IJCAI 2017, in Melbourne, Australia, in August 2017. The 12 full papers presented in this volume were carefully reviewed and selected from 18 submissions. They cover a wide range of topics related to computer games; discussing six abstract games: Chinese Checkers, Chinese Dark Chess, Hex, Othello, Poker, and SameGame.