Some time after finishing development of Defender of the Crown, Sachs began working on a 20,000 Leagues Under the Sea game. Unable to secure the rights for a game based on the Disneyfilm, Sachs instead based his game on the original book by Jules Verne. His game used a custom boot-up routine, as many games of the era did. His work, however, was destroyed by a usually innocuous virus which installed itself in the boot sector of floppy disks. The virus remained hidden until about the fifth soft reboot of the computer, when it revealed itself with a harmless message. However, because of Sach's custom boot routine, the virus destroyed his work on his development disks. After this, Sachs apparently abandoned development of the game.