Having already taken a brief tour of Rapture through the eyes of a Big Daddy a few months back, we were okay with the fact that BioShock 2 looked and seemed to play very much like the original game -- only this time encased in a huge pressurized diving suit. Now that we've played through a full area of the game, our initial assessment more or less holds up, but that's not to say there aren't several noteworthy -- and even surprising -- changes and additions to expect when the game arrives next spring.Warning: We've done our best to keep what you're about to read as spoiler-free as possible, but the extremely sensitive should tread cautiously beyond this point.

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