Metal Gear Rising Walkthrough Part 15 – R-02: Research Facility (Warehouse to Finish)
Head down the corridor. Grab the Repair Nanopaste and the EMP Grenade. Head through the rest of the corridor to make it to the next Ranked Battle. This is a special Sub-Boss Variant on the GRAD unit, something you will encounter more laster on in the game. Just open the door and head on in. Use AR mode to go over what is in here and note the location of the Item Box. Do not open it now, it is needed for the battle. Just head over to the right and wait for the cutscene.
Ranked Battle 8: GRAD
Once the cutscene is over, run for the item box. It is locked so a quick use of Blade Mode will let you slice it open and claim a Holo-chip (L). After that close the gap between you and the GRAD, what is firing all the bullets with Ninja Run. Close in on it and begin your assault. Use Parry Counters if at all possible or just block any incoming physical attacks. If you are looking to take fire, start Ninja Running or break off into one of the side areas behind cover to avoid it. Just keep at it until you knock it into the far part of the room. This is when the second part of the battle begins.
During this phase of the battle the GRAD will enter its bipedial mode. Move in and Parry Counter its opening attack. Quickly move in and keep in close. This will keep it and you will have little trouble beating the GRAB. Watch out for its melee attacks but those are great opporunities for a potential Parry Counter or just a brief pause. By keeping in close you will ensure it cannot unleash its homing missles on you which can do notable damage. It will also shorten its list of attacks against you. Not only can you avoid its gun fire easier but it will use more Melee attacks giving you more of a chance to get through with a Parry Counter. Just keep this assault up until you can get it down 10% or less where you get the Execution Option.
When the dust settles from this confrontation there are a few things to grab in the room you fought in. One is the Holo-Chip (L), if you did not grab it earlier back in the first room. Aside from that item, there are 2 Repair Nanopaste in the final room: one in each corner. Head out through the Eastern side of the room.
Head down the corridor and grab the RP Grenade on the left. After that, use AR Mode. Raiden will see 2 Soldiers aimed down the corridor where he is about to emerge. More importantly, one of them has an ID Chip in their left hand. Ninja Run toward them and take them out. Be sure to cut off the left hand of the Cyborg on the right. The Slide Tackle/Zandatsu approach is perfect for this.
With those Cyborgs down, head for the opposite end of the corridor. There Raiden will find another EMP Grenade. Grab it then head back to where you fought Cyborgs and go through the door on your right. Go through the doorway and immediately go to the right. There you will find VR Terminal 7. Approach the machine on the left and you get a call from Dok explaining what it is. From there just interact with the Door control panel on the right, opposite the machine, to finish the File.