IGN reviews Area 51, and starts off with:
The man is one of the worst voice actors on the planet. Spread the word. His "work" on XIII was the lowest point in the game. He might have been great as Fox Mulder, but he needs to box his weight. Producers assume that just because someone is "hollywood", they'll sound good in a game. It's a naive assumption, bordering on just stupidity. Voice acting isn't like Stage Acting. To quote Dan Rydell, that's why they have the two seperate words.
All in all, it sounds like IGN liked it though.