Bioshock

BioShock is the "genetically enhanced" first person shooter that lets you do things never before possible in the genre: turn everything into a weapon, biologically mod your body with plasmids, hack devices and systems, upgrade your weapons and craft new ammo variants, and experiment with different battle techniques in an incredible and unique underwater city.

You are a cast-away in Rapture, an underwater Utopia torn apart by civil war. Caught between powerful forces, and hunted down by genetically modified “splicers” and deadly security systems, you have to come to grips with a deadly, mysterious world filled with powerful technology and fascinating characters. No encounter ever plays out the same, and no two gamers will play the game the same way.