how to unlock 3rd and 4th weapon
First turn the difficulty settings to hard if you wanna unlock 3rd weapons and chaos if you wanna unlock 4th weapons then you must battle in in stages 3 or more stars (I preffered ultimate warriors level) then choose your subofficer yoshimoto imagawa or any subofficer that have skills ''appraisal'' on your subofficer then you must finish the stages.