Dangerous Games is a range of adventure stories aimed at reluctant older readers. The series is set in a computer games company and follows designers Sima, Kojo and Tom. Each story sees them designing and developing a computer game which they then enter for real - encountering exciting and sometimes deadly situations... When Tom enters a superhero game alone he soon ends up in grave danger. Sima and Kojo try to rescue him, but unknown to them, an alien has escaped to the real world!
A recurring nightmare of Kojo's gives Sima an idea for a game set in a medieval castle. The trio travel back in time, but soon Kojo is faced with re-living his nightmare over and over again.