[8.6]. Mission 6 - Deep Sea: Nullify Threat

Reactivate Teleportals: After the intro cut-scene, head through the steel door and down the tunnel. Elvis will be with you, and don't worry about him; he's got his own gear and can handle himself, just try not to shoot him by accident! Once you're through the next door, equip your IR Scanner. This is crucial because there will be cloaked guards who are otherwise invisible. Enter the next door and you can shoot any red guards if you want, but Elvis is faster and will even crack some jokes while he's at it. Head through the big door to your right, up the ramp. Go through the next door and clear out any guards. Follow the tunnel to the right until it ends. Go through that door, and keep following the tunnel until you reach a split into three paths. The left path leads to a shield. Head back to the door you came through, and take the path on the right that goes downwards. Fight your way through the tunnels until you reach an area with a scientist and a guard. Take them both out, and Elvis will comment on reactivating the teleportals. He'll then head up the ramp to do just that, completing Objective 1.

Disable Cetan Megaweapon: Now, backtrack to where you found the shield down the left path earlier. Instead of taking that left path again, take the right one this time. Go through the curving tunnel and the next door, and you'll see a teleportal straight ahead – it's that big, moving thing on the wall. Hop in with Elvis. He'll give you the FarSight weapon, so equip that and stick close to him as you head towards the megaweapon. Go through the hallway and the next few doors until you reach a round room. Circle around the outside of this room and go through the door on the far side. Continue through the next door, and you should see two doors: one directly in front of you and one to the right. Take the door on the right, and you'll find yourself in the room with the Cetan megaweapon. Elvis will go over and disable it, marking Objective 2 as complete.

Escape from Cetan Ship: Time to get out of here! Exit the megaweapon room and take the door to your right. Follow this path until you reach another teleportal; step inside. Now, go through the door in front of you and approach Dr. Caroll. After a cut-scene, you'll have a strict 60-second timer to escape the ship. Follow Elvis through the door to your right and take the path until you can turn left. Go through that door and keep following the path until you see a large blue door on your left. Enter it, and then go through the next door to finally exit the Cetan ship and complete Mission 6.