4. MASS EFFECT
(BioWare/Microsoft, Xbox 360, Mature)

In this sweeping sci-fi epic, you play an elite operative dispatched to save the entire galaxy from mass extinction at the hands of an ancient race of sentient machines. (Hey, no pressure....) And while you're doing that, you might even find some time for side trips to remote planets, where all sorts of supplemental storylines and mysteries wait to be uncovered. Brought to you by the developers of the Knights of the Old Republic series, Mass Effect is a state-of-the-art action-RPG. — GEW