4th boss of the game dudes.\rbr\rbrIGN guides you through defeating the GRAD biped tank in mission file R-02 with an S ranking on Revengeance difficulty in this boss battle from Metal Gear .\rbr\rbrDifficulty: Revengeance. Platform: PC. Standard HF Blade - Full upgrade. No secondary weapon. No wig. All skillsfull hitpointsfull energy. Standard Raiden .\rbr\rbrNEW Metal Gear Rising Revengeance Gameplay Walkthrough Part 8 includes Mission 3: Research Facility of the Story for Xbox 360, Playstation 3 and PC.