I beat the first mission. Definitely got better as I got better. one thing that infuriated me:
[spoiler]when you kill campbell (poison or not) and don't kill the guard captain (who the girl asked you to save), you have to hide the captain's body. I hid his body, saw an update pop up saying I hid his body, then she still told me he never returned and I got nothing for it. Make sure you hide the fuck out of that body.[/spoiler]
also, I heard there is no new game plus, but you can replay missions. One of the runes you can only get if you get a certain power by the end of the first mission, which I didn't. so that fucking gay. other than that, fun exploration in deed.