Crysis 3 Walkthrough Part 12 – The Root Of All Evil (Penetrate CELL's System-X Facility)

Climb out of the water and go straight ahead. Go up onto the left-hand bank and keep along this side until you receive the secondary objective. At that point, turn on your visor and look ahead you of. You will find some intel, a Propaganda post. Scan it to add it into the data base. With that it is time to look into the CELL Locator beacon. Turn around and head back up along the river. Keep the visor up and look for things to scan. There are a lot of interesting things that can be targeted. If nothing else, when you close in from around 150 meters, look to the right, toward the river, to find some CELL intel on one of the soldiers there. After that continue toward the marker for the beacon. As you close in you will encounter a total of 8 CELL Soldiers. Cloak and move in carefully along the left-hand side. Alternatively you can use Armor Mode and just tear through them all without too much more effort. Deal with them or slip by to reach the back of the area where the marker is. You will find the wreckage of a helicopter. Just go over to the beacon and you will find CELL Intel as well as a Nanosuit upgrade kit inside the ruined helicopter itself.

With those items in hand head for the river again. Just keep moving along from there until you hear from Claire. When you do it is your signal to break off to the right. Keep going to the right into a cave to find a rusted pipe that leads to a second smaller cave. Go in there to find an Arrow Cache, a Nanosuit upgrade module and a Datapad. Head into the first cave to find a second Datapad and you can find a Special Ammo Cache. After that just head through the cave and go on out.

When you emerge you will be close to the System-X Facility. If you completed the earlier optional objective you have the access codes needed to get right in (and complete the next optional objective). From where you emerge, take a moment to mark all 8 of the CELL Soldiers in the area. You largely will be encountering Troopers so you know what you are up against. Cloak and head down the slope, visor active. On the other side of the river is a mine node. Use the visor to hack it and stop the mines from blasting you. Close in on the facility and you will be able to broadcast the code you got and open the front door for Prophet. You can open the door, but it is not yet time to go through it.

Head around the compound to the left to get to the back side of it. Drop down into the pit there and go into the tunnel. You will find a Datapad on the soldier's wrist as you are entering it. From there head around the corner and go down toward the exit of the pipe. Stop after going around the second bend so you can hack the mine's node. This will save you some grief and do a lot to keep you alive a lot longer.

With the mine hacked it is safe-ish to head into the compound. There are a number of CELL Soldiers spread throughout the area. From here you will want to head up and to the left. Take out the soldiers, if desired so you can get at the center of the compound. Use the Visor and you will find a storage unit with a lot of ammo inside, a Sniper Rifle and a Nanosuit Upgrade Module. Then head into the rear of the compound over to the left. In this small area you will find a pool of water. Dive in and down to the bottom of it. There you will find a Nanosuit Upgrade Module. Grab it and return to near the center of the facility. You will find the elevator that will take you down into it there.