I find the missions are MUCH easier when simply brute forcing your way through. Which is strange, because being stealthy is supposed to make things easier.
There are also quite a few AI glitches. I've had it where gaurds, having no alert level, will suddenly attack me. At this point I'm holding no weapons, I'm in a good disguise, and I'm not in a restricted area.
Overall, a good game, but definitly in need of some polish.
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I love the power glove. It's so bad.