Walter Jones, an eccentric billionaire, is found dead on the Maldivian island of Sagorah. There, he had built an enormous Art Deco tower that he hoped to turn into an exclusive holiday resort. His death seems like a nightly accident at first, but turns out to be a mysterious murder. Furthermore, a heavy storm is raging, almost cutting off the island from the rest of the world. At the time of Walter Jones' death, there are eight people staying in Jones' pompous hotel: his grandchildren with their spouses, his lawyer, and the tower's architect. Two native Maldivians live nearby.
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.