What does it mean to be competitive in a single player game anyway? Finishing a game on minimaxed characters is the easiest way to do it, how is it competitive? For teh score? It's ok, if you play it the first or second time... But when you know the mechanics, you may want to put some RP constraints on your character, to make the game more challenging. Play a vegetarian, atheist, kleptomaniac, misogynist or whatever the mechanics / story allows. If all you do with RPGs is finish it with all spells, bestest weapons and I HAVE MAXED STATS I KILL ALL MUAHAH, then you miss some point of the genre IMHO.