The point-and-click puzzle adventure game Abyss: The Wraiths of Eden (4.5/5 stars, guidance suggested, FREE today only) is today’s Amazon Free App of the Day. From Amazon:
Plunge into an endlessly enthralling sea adventure! Ready to strap on your oxygen mask? Famed underwater explorer Robert Marceau has disappeared under mysterious circumstances, and now his fiancée must descend to the gloomy depths of the ocean to find him. Venture into unknown and unsettling waters to investigate the sunken city of Eden, now controlled by demons, find hidden objects and confront eerie sea monsters in this heart-pounding quest to save a missing diver!