Although it probably doesn't matter anymore, I somehow feel the need to give an answer. The "Max" Option became available to me later, after clearing "Dong Zhou in Luo Yang" or "Divided Land". I think you just have to play through a few scenarios.
Gaming is about escapism, about living through someone else with a more interesting life. My body is free to relax on the couch while my mind goes off to save the universe. I LIKE that. - Ben "Yahtzee" Croshaw