BioShock (Microsoft Xbox 360, 2007)
In BioShock, you take the role of an isolated crash survivor who discovers a city under the sea. This city, also known as Rapture, was once a utopia for scientists, artists, and industrialists. However, by the time your character takes his first steps into Rapture, the civilization has ceased to exist, and the place is nearly desolate. The signs of life your avatar finds are nothing like he's seen before. Creatures known as little sisters roam the streets of Rapture with enormous bodyguards called big daddies. Mutated humans drag their warped bodies around the city and attack you on sight. <br><br>The goal of the game is to find your way out of Rapture while uncovering the mysteries behind its existence. As you explore the open environment, you must defeat big daddies and little sisters to obtain a material known as Adam. The Adam can enhance your in-game attributes and unlock over 60 genetic skills that come in handy for all sorts of predicaments. The city of Rapture is almost completely interactive, and you may collect objects for later use. There are also six modifiable weapons to use including two types of guns.