I started playing on..I think Regular? Its a bit too easy. So far its good - I'm not as blown away as I was expecting, but its definitely worth the money. Still a little too COD style for me, lol...(ie. linear levels, no inventive objective accomplishments, killing TONS of bad guys) but its good, and should be a blast on multiplayer.
I am curious why the opening level features most of the cliche phrases from ALIENS, anyone else pick it up? Not complaining, just funny. Also, RSV got me addicted to adding/removing silencers, and having fire-selection --- how do you select semi-auto fire for your guns? I am wasting lots of bullets.
Only played a level or two, but I have a 4 day weekend coming up, so I'm sure I'll burn through it all --- then pick up Kane and Lynch next week