Alien: Isolation Complete Walkthrough and Game Guide

Escape the Alien and beat every mission to survive Sevastopol.

Alien: Isolation Complete Walkthrough and Game Guide

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Alien: Isolation is a survival horror game with a heavy dose of stealth, and we should also mention that it is absolutely nothing like Aliens: Colonial Marines, a game that was received rather negatively, to say the least.

The good news is, while Gearbox Software was responsible for Colonial Marines, The Creative Assembly are the ones who have expertly crafted Isolation. That’s not to say that Gearbox Software isn’t a great studio, but for anyone who might be inclined to carry some bad blood from one to the other, we’d advise you to give Alien: Isolation its fair kick at the can.

The game takes place 15 years after the events of Alien and 42 years before those of Aliens, the first two films in the franchise. Players will step into the shoes of Amanda Ripley, daughter of Ellen Ripley and series protagonist. Amanda is given the opportunity to investigate the disappearance of her mother, joining Samuels and Taylor on a trip to the Sevastopol, a space station that holds the flight recorder from her mother’s ship, the Nostromo.

While the plot certainly does get much, much thicker, we have no intention of spoiling it for you, opting instead to provide you with this free walkthrough. Let us guide you through some of the more difficult situations you’ll encounter on Sevastopol, leaving the story-telling to the game itself.

Mission 1 – Closing the Book – Taylor, Samuels, Verlaine

Complete your objective to Explore the Torrens by speaking to Samuels and Taylor, then making your way to the bridge for a briefing with Verlaine.

Mission 2 – Welcome to Sevastopol – Door Code, Get Through the Main Door

We provide players with the door code, and show them how to find a way to distract the looters so Amanda and Axel can escape.

Mission 3 – Encounters – Disable Security Lockdown, Evade the Alien

Aside from showing players how to sneak past the Alien, we’ll help them find a Data Cell and hack the elevator to Seegson Communications.

Mission 4 – Seegson Communications – Motion Tracker, Access Rewire

Players will get their first taste of the Motion Tracker in this mission, and we’ll show them where to find it, as well as the EMP V.1 to disable Synthetics.

Mission 5 – The Quarantine – Passcode, Keycard, Dr. Morley

This adventure will feature a heavy dose of the Alien, and we’ll help players sneak past the Xenomorph to find the passcode and Dr. Morley’s keycard.

Mission 6 – The Outbreak – Stun Baton, Passcode, Synthetic

Players should expect many encounters with the Alien over the course of this mission, but we’ll help them through it with minimal risk.

Mission 7 – Seegson Synthetics – Smoke Bomb V.2, Compression Cylinder

Find out how to sneak past the humans and power up the Requisitions Android in order to retrieve the compression cylinder.

Mission 8 – Haven – Gas Torch, Flashbang V.2, Revolver, Marlow

Reactivate the transit at the main console and use your Cutting Torch to regroup with Samuels, Taylor and the Marshals.

Mission 9 – Beacon – Distress Beacon, Winch, Alien Nest

This will be one of the easier missions throughout the game, but it can be tricky when players are asked to return to the winch. Find out exactly how to complete this objective.

Mission 10 – The Trap – Get to the Airlock, Flamethrower, Noisemaker V.2

Players will spend quite a lot of time fighting, escaping and evading the Alien as they try to trap it in Sevastopol. Luckily, they’ll have their Flamethrower.

Mission 11 – Hazard Containment – Plasma Torch, Shotgun, EMP V.2

Fight through the hostile Androids on the way to the Marshal Bureau, then find Samuels in Seegson Synthetics.

Mission 12 – Synthetic Solution – Security Access Tuner, Grid Purge, EMP Mine

This mission has players making their way to Samuels, sneaking past hoards of Walking Joes in order to help him halt the grid purge before it’s too late.

Mission 13 – Consultation – Door Passcode, Gas Mask, Security Capabilities

One of the sneakiest objectives in the entire game is to reduce Apollo’s security capabilities, but with our help it’ll be completed in seconds.

Mission 14 – The Descent – Boltgun, Reactor, Destroy the Nest

While players are attempting to destroy the nest they will have to deal with Facehuggers, then make their where back out and overload the reactor.

Mission 15 – The Message – Ellen Ripley, Nostromo, Marlow, Flight Recorder

Once players take the shuttle to the Anesidora they will need to track down Marlow and Taylor, then take a moment to listen to a personal message from Ellen Ripley.

Mission 16 – Transmission – Torrens Coordinates, Ricardo, Xenomorph

It’s time for Amanda Ripley to go for a spacewalk if she plans to locate Verlaine and the Torrens. Once she’s outside our guide will give players the coordinates required to do so.

Mission 17 – Desolation – Restore Power, Passcode, Keycard

Players are going to spend more time escaping the Alien, which is likely why it’s so easy to miss the passcode and keycard required to find an alternate route to the Spaceflight Terminal.

Mission 18 – Tomorrow, Together – Release the Torrens, Ending

After a long campaign, it’s time to wrap things up and get players back onto the Torrens where they can reunite with Verlaine and enjoy the game’s ending.

Last Survivor DLC Mission – Ellen Ripley, Sigourney Weaver, Nostromo

Play as Ellen Ripley, mother of Amanda Ripley, as she tries to self destruct the Nostromo and escape on the Narcissus. Our tips will help you to avoid contact with the Alien at all times.

Crew Expendable DLC Mission – Ellen Ripley, Airlock, Ash

Navigate through the vents and survive the Alien in order to trap it in the Air Lock. Players can choose to play as Ripley, Parker or Dallas in this exclusive bonus content.


Find all 10 Nostromo Logs – Archivist Trophy

Make sure you have your Ion Torch. You’ll need it to track down these hard-to-find collectibles.

Collect all 151 Archive Logs, Voices of Sevastopol Trophy

How to find every Archive Log in the game. 

Collect all 50 ID Tags and Unlock The Taken Trophy

All that’s left of Sevastopol’s doomed population. We’ll tell you how to get each ID tag.

Now you know how to survive Alien Isolation. Let us know what you think of the game.

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