I've completed 19 challenges but I can't complete the last one because it's to kill at least one enemy with each weapon and apparently I'm missing a weapon because I've done that a couple times now without getting the challenge. Is there a weapon past the invalidator or am I doing something wrong?
Fun game but as soon as one customer leaves due to wait time, all customers do the same. My register is maxed out as is everything in the store but most days now half my customers leave due to wait time.
It only checks unlocked weapons. Try to kill at least 2 enemies, just to be sure.