Metal Gear Solid: Portable Ops/To the Plant

Snake is back, and now you need to head to the Plant.

Before going to the Plant
As you can see in the side bar, now is a good time to rescue Raikov if you can. You can also recruit Sigint. But there is also another person to recruit, and for this you will need to put spies in the Harbor.

Harbor
You will need to go inside the boat, and drop down to the ship's hold. You will receive a call and return to the map. The recruitment will continue later.

Preparing for the next mission
The next mission will include a Boss Fight, so you should save beforehand, and make sure you come with RPG ammo. A Body Armor could help. If you were using Jonathan, remove any valuable items from him.

Plant
You need to infiltrate the Plant in order to destroy Metal Gear. But of course, Metal Gear will be manned by a certain someone, and there will be a Boss Fight:

After the fight, there will be a cutscene and you'll return to the map. You will need to put spies in the Silo Entrance until you get a report, put spies in the Ravine, then wait.

Ravine
There are no important or unique items here, so just go south around the building, drop down, and just dive roll to the other side of the Ravine.

Power Substation
The only important item here is the M10 located in the building not far from where you enter it. Don't bring any explosives with you you won't need them, just enter the building from the back and then head to the Control Room. You will return to the map and wait until the Tech Unit develops a Time Bomb.

Before returning to the Power Substation
There will be a Boss Fight, so bring either the Mosin Nagant (or the Mk22), or the RPG, and if you want the Body Armor.

Power Substation (again)
You can check if the Time Bomb is ready by trying to launch the mission at the Power Substation (Campbell will tell you the Time Bomb is ready), if not, just wait. Don't forget to equip the Time Bomb before starting the mission! (this time, it's Snake who sets up a Time Bomb). Go back to where you were when you the first time, and plant the bomb, a cutscene will trigger, and there will be a Boss Fight:

After the fight, there will be a cutscene.