OceanDive

OceanDive simulates a scuba dive on a coral reef in first-person 3D. Swim through shoals of many-coloured tropical fish, past the wreck of a submarine, through dark tunnels and into the shattered remains of an ancient temple.

The unregistered version is a non-interactive screensaver (with nag messages). Registration unlocks extra areas, as well as the all-important playable element of the game, which gives you full freedom to swim wherever you like in the game's undersea environment. There are animated creatures including shark, turtle, squid and clownfish. Finding hidden coins will open new areas of the map, though an option on the main menu will open all areas at once, if you prefer.