I played the demo last night for a while. First of all, that's a great demo in terms of lenght. It's annoying to sit there and load up big demos to get 5mins of playtime. Well done sucker punch of providing a demo that gives you a good flavor of the game.
The graphics were nice but often it seemed to be at the expense of framerate when doing a large amount of explosions. Like clearning the tracks for the train by blowing up the cars in place. However these situations didn't come up too often during my playtime so things ran smooth for the most part.
I wish there was a zoom option (is there?) when you're firing at people in the distance. Having the enemies being able to shoot you easily while you try to line up the circle with their head proved to be a challenge at a distance. Also, is it me or the roll makes you practically invincible?
The jumping was cool but there didn't seem to be any penalty for missing jumps or frankly, any real technique. In Crackdown, you almost had little puzzles in the way you could scale certain building and if you feel you were hurt or killed. I jumped off a few high building only to land cleanly or better yet it was promoted to power up my ground pulse thingy or I could levitate and control my rate of descent. I noticed that when I'd jump close to something he'd automatically grab and get ready to climb vs just jumping to where I need him to go.
It was cool having all these powers to do moves but just the powers alone doesn't seem enough. It would be nice to be able to pick up weapons (maybe I'm just a gun junkie!?). Are there vehicles in the game? To have a big open world would any vehicles you can use seems a bit weird. However, you can do some real cool combinations with the moves you have. Just that over the lenght of the game, it might get somewhat boring to not be able to drive to places or shoot the guns that keep shooting you.
I really enjoyed all the animations and power combinations you could do but I found the npc's to be a bit plain. They AI didn't do much and the spectators seemed to have Assassins Creed syndrome in that they repeated the same stuff over and over.
Perhaps I missed the detail but I couldn't tell what the diff was between good and evil outside of shooting blue stuff vs red stuff. What I though was life bar was a good/evil circle and what's the lightning stuff next to the circle?
Overall, the demo was good but nothing screamed must have to me. Isn't there a similar game coming shortly called "prototype" or something?