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Your first and most important instruction inAtomfallis to find the Interchange. The game is an open world in the purest sense, so there are multiple ways to get there and several approaches for tackling it once you’re inside, but make no mistake - the Interchange can be one of Atomfall’s most dangerous areas.
The Interchange is a huge place to explore, and you can breeze straight through it or take the risk and comb every inch of the facility. Here’s what you need to know if you want to make it through and reach Oberon.
Where Is The Interchange?
The Interchange is amassive underground labyrinthbeneath the Quarantine Zone. There are four entrances, each of which canonly be opened from the outside. That means that even once you get in, you’ll have to go back out and around to open another door and use the Interchange as a shortcut between areas.
The Interchange entrances can be found at the following coordinates:
Inside each Interchange entrance is an explorable foyer area,usually containing a handful of enemiesto deal with on your way in. When you reach the massive sealed door,go upstairs to the control roomand insert the Modified Keycard you received from the unnamed scientist at the beginning of the game. This will permanently open the entrance.
What To Do In The Interchange
Your main objective in the Interchange is toactivate the Central Processor, which will open the way to the Oberon Site. No matter which entrance you first enter the Interchange from, it will lead you to the Central Processor, which acts as the main hub for the area.
Loot the dead scientist next to the main terminaland use his Atomic Battery to turn it on. You then need topower each of the four Data Stores belowwith a separate Atomic Battery.
Atomic Batteries can be found throughout the Quarantine Zone. Check out ourguide on how to find themif you’re having trouble gathering enough.
Data Stores
By default, each Data Store can only be accessed from one or two Interchange entrances. To reach the others, you need to eithergo back outside and reach the other doors; once you do, you can move more freely within the Interchange, but this often means you have to risk the turrets and combat robots in the lower section of the Interchange to cut across to the other Data Stores (which is much faster, but also much more dangerous).
Placing an Atomic Battery in each Data Store - Alpha, Bravo, Charlie, and Delta - willpower another section of the Interchange, and also unlock optional facilities to explore in the lower depths. These are dangerous places to go, filled with Thralls and other tough foes, but they have excellent rewards, and many are required if you want to see specific endings.
Delta
Slatten Dale
The Medical and Robotics facilities will unlock as you power up Data Stores, but the Detention Quarter is blocked by a container. Search the side room next to it to find a body with a keycard, which you can use to operate a crane and move the obstacle.
How To Power The Central Processor
Once all Data Stores are all active, you can power the Central Processor by returning to the hub with a Signal Redirector. Look forjunction boxes under the floorby each of the doors leading to the Data Stores;using the Signal Redirector on eachwill power the processor, letting you pull the lever and activate it.
The door to the Oberon Site will open, allowing you to proceed to the endgame. When you reach Oberon, you’re able to:
Your decisions here will determine which ending you get and who will let you escape. Watch out for thethreeflamethrower botspatrolling the dig site, and the Thralls throughout the area. There’s also an infected tunnel on the right side of the site that has Spores to harvest, but also several Ferals.
After completing your chosen ally’s objective at the Oberon dig site, return to them to finish the game.
