Earning all 60 badges in game seems to be impossible. The projectile pro badge needs 15 throwable weapons mastered but if you master all of them, it claims only 14 have been mastered. I'd guess the spear is the buggy one. Without the badge, you can't earn the "special reward" for 100% completion.
 "Idle Necromancer"){kind=icon}
 "Cactus McCoy 2"){kind=icon}