The fields HCI/usability and computer games have existed for a few decades with virtually no mutual interaction. However, in recent years, a number of exchanges have appeared, both in academia and in practice. This paper presents a preliminary account of this development. Exchanges in both directions seem viable: evaluation methods from HCI/usability towards games and interaction techniques and supporting user communication from games towards HCI/usability. The paper concludes with a discussion of the differences and similarities between the two fields. Author Keywords HCI, usability, computer games, video games, interaction. ACM Classification Keywords H5.2. User Interfaces.