A gamer has completed his personal challenge of knifing his way through an entire prestige of Call of Duty world at war. HQ GAMEOVER has posted video proof of the achievement with not a single shot fired or explosive used. Kill streak perks were even off limits as well, with the exception of the recon plane. A picture of the controller used is also on the post, the triggers and bumper buttons were hot glued in place to prevent accidental discharges or grenade drops.