Silo (San Hieronymo Peninsula)

Mission
This mission is easier if you use a FOX operative since they are used exclusively in this area. Most of them are armed with M870 shotguns so you don't want to get into a firefight with them. make sure you have a slot free for an extra item and having chaff may be useful (although it can be picked up in game). Once on the main level you will want to head north however there is a pillar in front of you go past it on it's east side as there is a security camera on the other side. beside you there is a door that needs a key and a guard will be patrolling. turn west and you will see another guard wait on his patrol route out of sight of the other guy and knock him out as he goes past. you can then knock the other guard out too. back where you knocked out the first guard there is a door to a warehouse. By rolling across the gaps you can get to a special item (the door key), if you fall there is a ladder in the corner with the door. Go to the locked door and it will unlock.

from the door head north. to the west there is a guard and further along another locked door. if you knock-out the guard there is a radio frequency behind him that unlocks the door. if you keep going you will come to another guard (pacing) and if you interrogate him he will tell you that he left the frequency somewhere up high. keep going and eventually you come across a room with gun cameras protecting the doors. if you climb up you can find chaff. disable the cameras with the chaff and go into the room with the guard in the corner. If you startle him you may have to throw him down with CQC. a partial frequency is written on the window behind the door.

go along the walkway and there is a room at the end of it with a secret item in the corner. there is also a hidden gun cam so use the chaff. go to the walkway and drop down to the one below. from here it's easy to find your way to the end.

Boss: Cunningham
You need to damage the flying platform enough that it drops below you. The RPG-7 or M63 work well. Then aim at him to do actual damage. repeat until he dies