Guitar Hero: Metallica

UNOBTAINABLE, DUE TO SERVER CLOSURE

A Pro face-off match is when you and your opponent play the same song on the same difficulty and the one with the largest score at the end wins.

Select "online" from the main menu and from there either create an online pro face-off match or use the search option to find one. Once you find one, beat your opponent and you'll have this trophy.

NOTE: Lately there are hardly any people playing online so it's going to be very difficult to find anybody playing online. I suggest using the Boosting thread found here: Trophy Boosting Thread