Quote from grapen5 minutes ago, grapen said: Every level has a solution in no powers mode. I've done it and the devs even acknowledge it in this thead
There were potential "solutions", but they required me to kill or get spotted, as I wrote above. So yes, maybe it is possible to complete the game with no powers, but in my case I got stuck in an area that I couldn't exit unless I broke my playstyle. A case like that doesn't exactly scream good design.