Why We Play: Affect and the Fun of Games—Designing Emotions for Games, Entertainment Interfaces, and Interactive Products
Without emotion there is no game. Researchers have only just begun to explore the role emotion plays in human activities. This article is an excellent summary of the state of the art about emotions and games, and is of great interest to understand how to design a game taking into account the emotions of the player.
This paper is included in the excellent handbook "Human–Computer Interaction Handbook: Fundamentals, Evolving Technologies, and Emerging Applications, Third Edition" (2012), pp. 725 - 747. Ed. CRC Press, ISBN 9781439829431