Ascent
Spirit walk and go through the lasers blocking the way (#323). Push the button (#324) and with the security off safely head to the door. You'll reach a huge hall, overrun with flying monsters.
Kill the enemies and head to the other side of the room. Use the panel (#325) to open the door and enter. Near the energy batteries there's a switch (#326). Use it and look around the small room behind the nearby door. There's some ammo here.
Head back to the hall and defeat some more opponents. Gather the ammunition and refill your energy, then activate the shuttle (#327). At the center of the room there's a blue ring (#328). Enter it with your ship and you'll be transported to a higher complex.
Carefully land the shuttle (#329). If you're caught by the motion detectors, you have to fight off some turrets. Look around the room and press the button (#330) controlling the hatch. Get back to the ship and fly up.
Heading through the tunnel (#331) won't be too easy. Besides robots, you'll have to destroy huge spheres that are in fact mines. There are also some turrets on the walls (#332), that can really darken your day if you're not careful enough. Watch out for the clouds spewing out of the holes, as they damage your armor as well.
At the end of the way you'll see a hatch blocked by some junk (#333). Use your grab-gun to get rid of them and use the passage you've cleared this way. Land the shuttle and kill the hunter operating the mechanism. Use the panel (#334) to open the next gate. Before you board the ship again, take a look around while spirit walking, and you'll find an ammo locker.
Get rid of some more junk (#335) that's blocking the way and leave the alien ship. You'll end up in outer space, where you'll see the alien planetoid (#336). Land on the platform to the left (#337). Kill the hunters and press the button (#338) that opens the hatch. Get back to the shuttle, deal with the robots and go towards the asteroid.
Go around the planet and use the landing site on it (#339). Jump on the pipes (#340) and follow them. After a short walk you'll reach a small platform with a switch on it (#341). Press it and head back to the ship.
Once again head towards the platform where you opened the hatch. Notice that there's a glass container under it, and inside it there's a small ring (#342). Enter it and wait for the crane to take you to the other part of the complex.
Land on the platform (#343) and press the button. You'll turn on the machine that's constructing new glass containers. Get back to the shuttle and enter the ring (#344) before the crate is complete.
When your shuttle is free again, use the landing site (#345) and get rid of the enemies. To the right there's a portal (#346) that leads to a small room where you'll find some additional ammo. Being fully armed, head to the opposite edge of the platform. Shoot the grav-switch on the ceiling (#347) and go forth. At the end hit the other switch (#348) to return to the original position.
There are snipers around. Eliminate them quickly and approach the huge opening in the wall (#349). Spirit walk inside. You'll reach a control room. Use the stairs there, jump across the force field, kill the hunter and push the button (#350). You can now go back to your body.
Get to the control room again and refill your energy gun ammo. Get rid of the annoying robot and head to the door. To the left you'll see a laser motion detector (#351), and to the right - a force field. Crawl below the red string and go into the corridor to the left.
You'll reach the generator room (#352). Notice that there are four containers on the walls, each sending an energy beam. You have to destroy it. The lack of power will cause all the locked doors to open.
Head to the room with the detector, but this time use the passage that was behind a force field before. In the next room there are some spiders awaiting you. The fight won't be easy, as the whole corridor is filled with darkness and you can't see too well - even the lighter won't be of much help here. The best way to beat them is to stay near the door and watch where the projectiles come from. When you manage to defeat them, gather the ammo around and refill your energy.
Get back to the door and find a grav-switch on the ceiling (#353). When the room is turned upside down, go to the opposite end of it (there are some turrets to take care of here). You'll see a familiar blue portal (#354) that allows you to finish this chapter of the story.
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