Mission 12: Hellbound

- This mission is a continuation of Side Ops 82 (which was in turn interrupted by Mission 11). First you'll need to sneak through Serak Power Plant, which is best done by taking the route on the left (northwest) side of the road, which allows for relatively easy sneaking past the various guards. Once you reach the main gate at the end of the main road, sneak through (alert status is not allowed) to trigger some scenes. Mission 12 automatically begins afterwards.

- Ther[Subsistence]'s not much to do in the bunker, but you can take out the two guards (and even extract them) and loot the place. The most important item around is an intel file that holds the location of Dr. Emmerich. It can be found on one of the platforms.

- You'll have to make your way back out of the Serak Power Plant. This is best done by hugging the east rock walls continuously (which is to the left as you make your exit). Be extra careful as you pass from building to building and take out nearby enemies with your suppressed tranquilizer gun. Near the far exit, move over the rocks and pipe to reach the main road safely and unseen.

- You're now set for Afghanistan Central Base Camp, which you can travel to with D-Horse. Either avoid or 'capture' and loot the outposts you come across during your journey towards the Base Camp.

- Once you reach the Base Camp, take the rocky lower right path instead of going over the main road. Ignore the gunship patrolling the area and only focus on enemy soldiers directly in your way. Move underneath the main road viaduct and continue north.

- When you're about to pass the large, half-destroyed hangar, take note of the sniper standing on top of it. Climb the building and take him out, then continue towards the north/northwest part of the base.

- Optionally you can collect a blueprint for one of the optional mission objectives by checking out the hangar to the east of the one you just passed (the main road leads to this eastern hangar). The blueprint is found inside.

- Again optionally, but on your way towards the main mission objective, is a Glamor Model Poster stuck to a wall of the relatively small warehouse you cross by as you continue north/northwest from the main road.

- From this small building, continue north and take out any nearby hostiles if required. Try to avoid the Walker Gears altogether, unless you're feeling particularly comfortable with taking out the soldiers controlling them (with tranquilizer headshots).

- Emmerich is found inside the hangar to the northeast of the whole base camp, which you've reached by now. Enter via the door on the east side.

- After th[Subsistence] scenes, ignore Emmerich's suggestion to take the Walker Gear (unless, much later on in the game during a replay, you wish to extract it with Fulton Cargo 2) and head back the way you came. Once you've passed underneath the road again, stick close to the main road's side and head for the fenced generators towards the end. As you exit the camp entirely, a scene will play.

- Quickly rush underneath Sahelanthropus' leg[Subsistence] and immediately take a right turn to temporarily hide behind the wall here. Chances are that Sahelanthropus has already seen you, so keep dashing towards the large builders and rocks in the distance. This is a good place to lose the Gear's attention - it will send out some pods with search lasers to pinpoint your exact location, but as long as you manage to avoid being pinpointed for too long (while staying out of Sahelanthropus' main vision), it will lose track of you. A very good trick to lure Sahelanthropus away from you and the extraction helicopter is to send the chopper to the second (further away) landing zone. The Gear will soon follow it to see what's going on over there. Simply head to the closeby landing zone and call the chopper back for exfiltration. Although Sahelanthropus will indeed come back running, this should grant you just enough time to at least get in the chopper with Emmerich.

- Inside the chopper, you're not there just yet. Quickly grab hold of the gatling gun to the side and target/destroy the pods Sahelanthropus send[Subsistence] your way. Let the gatling gun cool down a bit after destroying them, then unleash its full power at the Gear's head as it leaps towards you to smash it Back Down.

[Subsistence]-Rank Tips: As usual, speed and Stealth are key to a superior ranking. During your travel from Serak to the Base Camp, rush by all outposts without being seen, and quickly head towards Emmerich once you reach the Afghanistan Central Base Camp. Extract him unseen and without him taking damage. Do the optional mission objectives on a different playthrough.