Yeah, the difficulty is pretty crazy. Reminds me of the AvP 1 demo.
However the last scene of the swarm of bugs is absolutely awesome. Seeing them in the distance, hundreds of them kicking up a huge dust cloud.
Personally I would have kept a small squad with the player during the little excursion in the demo. Other then that it's fun, mindless action.
Tactics are definately needed against the bugs, they're easy to kill with a shot gun in their "head" nerve node... thing... If you keep shooting limbs off you just get an angry bug.
Is it just me or are the little walking potato bug looking things the eyes and ears for the brain bugs?
In many ways this game is closer to what I wanted out of Halo. (well minus no vehicles seen in this yet)
Now this game with vehicles and also the powered armor from the book. (jetpacks, nuke weapons et al) would be definately freakin' sweet.
As it is, the whole fighting massive swarms of bugs has sold me on. It's like AvP but in broad daylight.