Gameplay
Nacke, L. E., Drachen, A., Kuikkaniemi, K., Niesenhaus, J., Korhonen, H. J., Hoogen, W. M. v. d., et al. (2009). Playability and Player Experience Research. Proceedings of DiGRA 2009: Breaking New Ground: Innovation in Games, Play, Practice and Theory, London, UK. (online slides)