I did the vidmaster challenge endure by my self on legendary and all skullz on and its hard as crap so i can help u my current gamertag dont got that achivement yet but my last one does i still play wit it even though i have another one add my 2 gamertags as a friend [i probaly didnt complete the games on legendary] add these 2 gamertags as a friend #1 BrownLeon #2 Shottin N LOOTN