BioShock

Bioshock on Xbox 360 is a first-person shooter that takes you deep into the Atlantic Ocean to explore the ruins of a gigantic underwater city ravaged by the madness of its creators. Lost in the heart of this utopia transformed into a scientific abomination, you will have to fight with the help of plasmids (a kind of module that modifies DNA to acquire powerful powers) against inhabitants who have long since disowned their humanity.