 Their first product was an adult video game based on "Tetris", which they then offered on floppy disks in the ad section of "Computer Magazine".Around this time CD-ROM games such as The 7th Guest were becoming popular, inspiring Van Biesen and Cannie to begin working with Private, one of the larger producers of adult video games at the time.Private released multiple Image-Line CD-ROM games including "Private Prison" and "Private Castle".