Would Brass Knuckles qualify? I can't really imagine trying to beat the game with a crusader with no melee weapon at all (I'm just not that good with the crusader lol), but I have been thinking of trying out the knuckles. They have very low damage, but a high chance to stun. I think it would be a fun thing to try out, though killing will certainly take longer and food might become an issue. Anyway, let us know how your bare knuckle build worked out. Does weapon focus even work when you have no weapon equipped?