This book constitutes the refereed proceedings of the Computer Games Workshop, CGW 2014, held in conjunction with the 21st European Conference on Artificial Intelligence, ECAI 2014, Prague, Czech Republic, in August 2014.The 11 revised full papers presented were carefully reviewed and selected from 20 submissions. The papers address all aspects of artificial intelligence and computer game playing. They discuss topics such as general game playing, video game playing, and cover 11 abstract games: 7 Wonders, Amazons, AtariGo, Ataxx, Breakthrough, Chinese Dark Chess, Connect6, NoGo, Pentalath, Othello, and Catch the Lion.