The term "casual" refers to games that are typically inexpensive to produce, straightforward in concept, easy to learn, and simple to play. Casual games span game genres with casual game titles occupying most, if not all, genre categories. Casual games are available across platforms, including PCs, video game consoles, handheld game consoles and mobile phones.
In Nielsen GamePlay Metrics data for March 2009, we tracked 847 PC casual game titles. Those 847 titles were played by over 43 million unique persons. On average, those 43 million players played around 30 minutes a day. Casual games account for 75 percent of the total number of minutes of PC video game play across all video game titles we track. Players of casual games are the dominant gaming group on the PC platform. This group has the vast majority of play minutes and a very high frequency of play.
Looking at the top twenty casual games in our May 2009 game play data, two genres are dominant—Card games, with 88% of casual game players playing a card game, and puzzle games, with 9.5% of casual game players playing a puzzle game.