Project Nautilus is a first-person underwater exploration game where you, a menial drone operator, navigate through the depths as directed by your employer, the shady mega-corporation, Isthmus Corp.
As Isthmus Corporation lays claim to a previously undiscovered cave system deep below the surface, you are assigned to survey the hidden caverns and uncover their secrets. You are entrusted to expand the company's wireless network with the placing of signal beacons as you explore.
As you explore the rich, biodiverse cave network you begin to discover remnants of a lost civilization and cultural artifacts including sculptures, etchings, and even old architecture. However, you must remember your one goal from Isthmus Corp., reach the bottom of this cave system and see what lies below.