I was wondering if anyone knew the exact requirements to get these 3 challenges to unlock. Ive tried this with both Dante and Raiden and have been able to beat the arcade mode with both of these characters on the highest difficulty without using a retry. Yet, at the end of each run I havent gotten credit for completing these challenges with either character. The description states "Complete arcade mode on... without losing or retrying". Some clarity on this would be greatly appreciated.