The Simple series is a line of budget-priced video games published by Japanese company D3 Publisher, a subsidiary of Bandai Namco Entertainment. Games in the series have been developed by several different companies, including Sandlot, Success, Irem, and Taito. It was introduced in 1998 for the PlayStation, and has been released for platforms such as the PlayStation 2, Nintendo DS, and mobile phones. The number in a series name indicates the price point of the games in the series; for instance, a "Simple 2000" series game would cost 2000 yen.
Early Simple games were generic interpretations of other common video game themes, including tennis, racing, and video board games such as mahjong. Beginning with the PlayStation 2, Simple games began using larger genres such as scrolling shooters and role-playing games, in addition to original ideas and concepts. As the games were sold at a low price point and required little development time, developers were able to experiment with gameplay concepts and mechanics. A few entries in the series were released outside Japan by other companies without the brand. After releasing two...