So yeah, up to this bit on my retail, I have tried absolutely spamming him with bullets, tried hacking him, just not working, how do I kill him?
I think I finally figured it out (just killed him then :LOL: ) When the mastermind starts hovering all the objects, destroy them/make him waste them until he starts bringing you towards him, then spam the A button and break loose. Now do this again and destroy the soldiers he puts out, and then destroy the floating rockets he launches. You should then be pulled towards him once again and now spam the A button again and kill him.. Dunno if that is exactly how you do it, but it sure is what I just did leading up to killing him