Beating The Game On Legendary

Playing a video game while getting one or more blowjobs (enough to span the entire time of the game), and winning the game.

Man #1: I can't believe we won every game tonight!
Man #2: Yeah, I even got the beating the game on legendary achievement!
Man #1: But we weren't playing Halo...
Man #2: I know!

By Coraline

Define Beating The Game On Legendary Meaning