Part 1[edit]
Luckily the first part does not have any real enemies, so it is good to adjust to the controls.
You will appear in the airlock open to the Katanga facility, enter onto the ship, go forward, then go down the large corridor to the left until you encounter the side door. Enter into the next room and afterwards, you will enter a type of control room. Go to the opposite end of the room and interact with the console on the left near the window. This will enable the door on the left to unlock.
Part 2[edit]
Continue through to the door on the left and along another corridor. It will open up to another room leading to a large looking room, where the commander will notify you that there is acid damage present. There are also some aliens seen on the left corridor, but they will run away in this time. Continue through this way to end up in the middle of a long hallway. Continue onto the left to find a collectible. To further the mission, go to the right and around the corner.
The aliens will reveal themselves fully and try to advance towards the players. Some way into the battle, the commander will alert the player that there will be an alien swarm coming from behind.
Continue around the corridor until you find a big door like the one near Hoenniker's chip. Click on he use key tpo begin cutting, although more aliens will show up to attack. Head through the door, look through the side corridor and take care of the aliens swarming there. Continue to the end of the corridor and you will end up in a large room. interface with the panel and prepare to fight xenos.
Upon unlocking the door, there will usually be one pouncer Alien waiting for you on the ceiling ahead, destroy it first before going through the corridor. You will then enter a large room with a large machine in the middle, Go to the left side of the machine to eliminate the approaching aliens, along with the ones that come to the right later. There will also be at least one acid spitting xeno. Interface with the machine terminal.
Part 3[edit]
You will need to download the logs in the left hand room. Do not worry about the dormant synthetics. You will enter a large room. Go to the terminal on the left. Once that happens a drone will appear from the nearby closed door. once the aliens are defeated go back the way you came and go to the other side of the room, eliminating the approaching swarming aliens. Go round the corner and enter the corridor and defeat the aliens, watch out for the acid spitting xenos.
Part 4[edit]
You will then enter an enormous room containing the dynamo. Go up the stairs on the left and overlocking the generator is the console needed to activate it. Get ready for the fight before you activate the terminal. Spitters, bursters and at least one warrior will be among the aliens. The aliens will try to rush up the two stairs.
Part 5[edit]
Continuing through a corridor behind the terminal, a warrior/drone will try to attack you, if it gets away it will later take part in the upcoming alien ambush ahead. You will enter a room with another room to the left and a hallway in the front. Aliens to come out of both the front and the side room, and eventually behind you. Once the fight is finished, and when Esther speaks via radio, go to the forward corridor.
Part 6[edit]
Upon entering a large room, aliens will swarm out of of any place. Expect bursters and at least one spitter during the fight. You can quickly make it to the ammo crate. Go through the corridor on the top left, beyond the doorway to the core there will be a pouncer waiting upside down. Go around the walkway through to the core. As soon as you have reach through the sheltered area, expect an ambush on either side of the walkway. Go through the corridor into another room and you made it to the final area.
Final Part[edit]
You will enter into an area with the large elevator. Make sure that you replenish ammo, health yourself and deploy consumables before pressing the elevator button because it will take time for the elevator to arrive and you will be swarmed with aliens. it always helps to add sentry guns facing the room where the majority of the aliens will swarm.
The majority of the aliens will come from the open area opposite the elevator doors, though some fodder aliens will come from the ceiling on the left side, though by time that they first appear, the commander will notify you.
There will be a time when there will be a spitter in some unreadable place that you will need to shoot. Expect some Drones to enter the battle. Once the elevator has reach your floor and opened, "Haul Ass" and head in top the elevator quickly to complete the mission.