I swear to god there’s more corpses and bits of corpses on this island than there have been people, ever. Move forward, grab some arrows, and use a fire arrow to clear the gas vent in front of you. It won’t be clear for long, so get ready to hustle.
Past the gas vent is a campfire and a document. If you don’t have axe fighting skills and you have some points, now would be the time to get them, you don’t have much ammo, and you can assume you’re gonna run into something creepy down here. Moving on, you’ll get a taste of just how ghastly this place is. Yeesh. Head down into the main cave and explore, your map will show you some goodies. Stock up on some salvage while you’re at it.
When you’re ready to leave, go interact with the gas pipe by the door, and then shoot it with fire. Instant exit! In the next area, a patrol will come your way. With a silent arrow, shoot the furthest guy first, which will let you get the drop on them. Remember, headshots and stealth kills give you more XP. If you don’t draw any attention, you’ll be able to sneak up on a fourth guard, a firebomber.
Climb up above where the guards were for another vent to blow up to open the path, and look above you further for a campfire and a relic.
Once you use the cage to get over the gate, look for a gas vent that you can use to drop three guys at once. Good for a laugh. And you may need it by now.
Ascend the climbing wall to the next section, which is a shrine to the goddess. Stealth kill the first guy you see, then kill the guy all the way to the right, up the stairs. Then put a fire arrow into the gas vent!
There’s a relic behind the shrine to the left. On the next level, use the rope arrow to pull the big pyre toward you. Then blow up the gas vent to bash the door open.
After that, you’ll do some running, some frantic sliding, and then you’ll have to run fast through a gas-filled tunnel.
When you get out of the tunnel, there are four guys. If you’re fast and sneaky, you can hit all four of them before they react too much. Otherwise, you’ll come under fire. Either way, when they’re done, the story moves on.
Blow up the vent beneath the cage, then climb up and jump on top of the platform, then over to the cage. From the top, shoot one vent and then another to move the big pyre to where you need it. Climb all over, jump off the platform, activate the two vents, and then get where you can shoot both of them at once.
Why do they always insist on building lairs on top of unstable areas? There’s no loot and no treasure to hunt here, but there’s some fun exposition along the way. Just keep moving. There’s only one guy who shoots at you that you absolutely have to shoot, other than that, feel free to ignore them.
After an extended cutscene, you’ll be in a very rough fight. Your cover can be shot away, so use your best gun, keep moving, and don’t get hit. Once you’ve taken out about six or seven guys, then there are two final guys, both heavily armored. Switch to the shotgun for them if you can. If you get a chance for a finishing blow, take it, it’ll put them down faster.
After that, there’s only a few more guys to kill as you exit, including one with a shield. After that, you’ll need to follow cover until you’re right in front of the heavy gun. Look to your left for a niche, and then a small platform you can hop up to. Look for a climbing wall, and then jump onto a rope. You’ll earn a very badass weapon accessory. After that, you’ll face another wave of guys, including several at an elevated position. After that, look for a campfire. The next section is BRUTAL with guys, so if you don’t have a weapon specialty, now would be the time.
There are a lot of guys here. They don’t swamp you, but they keep coming and coming, they’re well armed, some are armored, and visibility SUCKS. Use the survival vision to keep track of them, snipe with arrows or a zoomed in pistol wherever you can, use the grenades when optimal. It’s mostly a matter of patience and ammo, not tactics.
Next section, it’s a heavy machine gun and not enough cover. Stick to the left, climb the wall, and there’s a rope you can slide on. However, if you take fire, you’ll fall off. So take out the guys waiting for you and wait for a break in the heavy gunfire before you jump. Once you’re on the other side, you’ll have an opportunity to use your grenade launcher to take the bastard out.
After that, it’s briefly back to Shantytown for a lot of running, jumping and climbing, while the world burns. As ever, watch for the white bits that are safe to land on/catch, and remember you need to hit the button to slap your axe into surfaces, you don’t do it by default.