magik10 on 12 November 2008
Unless this is your first shooter, playing it on casual is pitiful. The AI sucks. There is no sense of danger or accomplishment. I finished it on hardcore and it was quite the adventure. There was constant tension followed by satisfaction for completion. Then to get the tickers achievement I went back to the tunnel section on casual. Talk about lame. I could literally just tank explosion after explosion without a worry in the world.
The whole campaign was a fun ride but it's easy to dumb down the ride by lowering the difficulty.
