Mission 29: Metallic Archaea

- This is a mandatory boss fight against the four regular Skulls, who are blessed with tough, regenerating armor this time around. Their armor is marked by a pink bar on top of their regular bar; you cannot inflict damage (regular nor stun/sleep) until you drain their armor first. Worse, the Skulls will regenerate their armore relatively quickly after you fully destroy it, so be sure to get some damage in before they get a chance to do this.

- Move away from Code Talker immediately. He'll be fine, since enemies do not attack him directly, but he can indeed die from explosions, crossfire, and so on. Taking the battle elsewhere will not put him in danger, if anything, the opposite.

- The battle can be hectic, but the key to winning is to stay on the move and to learn how to anticipate the Skulls' attacks. Their regular gunfire is annoying, but you can heal by taking cover behind obstacles or walls every now and then. Their rock attack, summoning an explosive rock from the ground at your position, is more harmful. It first trips you, then explodes shortly after that. If it trips you, quickly get back on your feet and rush away from your previous location.

- Hurting the Skulls with a powerful rocket launcher works well, but be sure to keep your distance to not get hurt yourself by the blast. The Skulls will summon a rock wall shortly after being hit, so move around them to get another blast in. Before you run out of ammo, quickly order a supply drop to refresh your stock of rockets.

- You can also counter their close range sword attack, leaving one of them stunned, allowing you to empty almost a full clip on them.

- Once you've defeated all four Skulls, rush back to Code Talker and extract him, or alternatively, first loot everything from the base, well-skilled soldiers included.

- [Subsistence]-Rank Tips: Wait until you have the Fulton upgrade that allows you to extract the Skulls, and try to defeat them as quickly as you can with a powerful rocket launcher or piercing sniper rifle.