Besides the generally overly-shadowed environments, the game is visually stunning. The first chapter, the Prolog, is all in gray scale and looks just beautiful. While playing through this level, I thought the entire game would be like this, and quite frankly, I would have been perfectly fine if that was the case. But it wasn't, and while the darkness of the rest of the game was a bit too much, it wasn't so bad that I couldn't handle it. Your character, Hayden Tenno, is the most detailed on the screen, and everything from his close-cropped haircut to his infected arm really stands out. Meanwhile, environments and enemies look pretty good, but often come off as a bit plastic, which seems to be an issue in the ultra-high-def generation we are in.
I didn't have any issues with the sound, but the dialogue seemed a bit stiff. I'm not saying Michael Rosenbaum (Lex from TV's Smallville) sounded bad or anything, I just feel like it was more of a script/story issue than an acting problem.