Bioshock

Bioshock begins as your plane plummets into icy and uncharted waters and you are forced to enter a lighthouse oddly located in the middle of the ocean. Discovering a primitive diving bell inside the structure, you board it and travel to the bottom of the ocean and into the haunting world of `The Rapture'. You discover that `The Rapture' was once a utopian society created shortly after The Second World war for only the best scientists, doctors and artists but has been ravaged after a war over `Adam', a genetic enhancement that gives people almost superhuman powers. Arriving after the great genetic war, the player finds the civilisation battered and blood-soaked, home only to those humans who were mutated beyond imagination by the very weapons they used in their great war.