It seems a bit weird to have a post devoted to combat, when, unlike most games, Krendel does not have a chapter devoted to it.
The first thing to understand about combat in Krendel is that it works just like everything else. The tests are the same, powers works the same, environment works the same, and so forth. In fact, the combat section only addresses a couple of special rules, like acting into a crowd, surprise, bouncing grenades, and the like