There's a new Mass Effect 2 trailer on the YouTube, profiling some of the enemies in BioWare's upcoming sci-fi RPG sequel. The clip features gameplay footage and developer narration; here's the pitch: "Learn more about the enemies Commander Shepard will face through Mass Effect 2 in this new video. View new creatures like the Collectors, praetorians, abominations and the ever-present geth. Also in this video, look AND listen to Legion, a geth who is stalking Commander Shepard."