I just registered here just to suggest Gothic by myself. I totally agree that the series is both fitting (as in "it' be a game pewdiepie would enjoy playing and the bros could enjoy watching") and incredibly awesome. Gothic III and IV were a disappointment in my eyes, since the studio had a functioning concept in I and II which they dropped only for the sake of creating something new, but that's all the more reason to raise some attention towards the first two games.