All games have been tested. Please not me that the 1st grade CD case is broken but the game works great. This product is a lot of 4 JumpStart PC CD games designed for children in preschool, kindergarten, 1st, and 2nd grades. The games are focused on early learning and are created by the brand JumpStart. They are suitable for use on Macintosh and Windows operating systems. The included titles are likely educational and engaging for young students, providing a fun and interactive way to learn important skills such as reading, math, and language arts.