This traditional point-and-click adventure game is a classical Who Dunnit. As inspector Jack Norm, you have to investigate which of the suspects might have a reason to want Walter Jones dead, talk to everybody, collect evidence or compare fingerprints. Your PPA (Personal Police Assistant), a kind of inventory/recording device, helps you during your inquiries.

Sinking Island can be played in two modes: in real-time mode, it's a race against time. In adventure mode, you can go through each place at your own pace.

Walter Jones, a billionaire had planned on opening up a resort for the rich and famous, but was killed before his dream could be achieved. It's up to Detective Jack Norm to crack the case by interviewing the people on Sinking Island to get valuable clues.