ATOMFALL the interchange: Power, Doors & Oberon Guide

The Interchange Explained: Your Route to Windscale

A locked underground gate is only the beginning of ATOMFALL the interchange. This government facility connects the quarantine zone’s regions and holds the route toward Windscale, Oberon, and the game’s escape leads. This ATOMFALL the interchange guide explains how to find its entrances, restore its four data stores, and reconnect the Central Processor without confusing access with actual power.

Spoiler warning: The walkthrough covers Interchange progression and opening the route to Oberon.

Atomfall’s official Steam listing describes a survival-action mystery built around exploration, scavenging, crafting, and conversations. That design matters here: several leads can point you toward the same facility, so you do not need to follow one rigid sequence of village quests.

The practical objective is straightforward. Open an entrance, restart the Central Processor, power the data stores, then reconnect their signals.

Requirement	What it does	Preparation
Modified Keycard	Opens Interchange access gates	Obtain it from the scientist in the starting Derelict Bunker
Atomic batteries	Supply the bootstrap terminal and data stores	Plan for five installations: one central terminal and four stores
Signal Redirector	Reconnects powered stores to the processor	Obtain it before attempting the final connection puzzle
Infection protection and healing	Help you survive Data Store Alpha	Prepare Strange Tonic, Dr. Holder’s serum, or sufficient healing supplies

The battery total follows the installations described in IGN’s guide. You can gather batteries from different sources; the terminals do not require a particular named battery.

Finding Every Interchange Entrance

There are entrances in Slatten Dale, Wyndham Village, Casterfell Woods, and Skethermoor. Wyndham and Casterfell feed into the same section, so discovering both gives you additional travel options rather than another data store.

Image: YouTube / gameranx

For ATOMFALL the interchange, distinguish the exterior entrance from the large quarantine gate inside. Reaching the building does not automatically open the facility. At the familiar sealed gate, climb the stairs on the left and use the Modified Keycard at the office terminal.

Entrance	Location or lead	Access concern
Slatten Dale	Near 31.0 E, 77.8 N, north of the Railyard and east of the Wyndham entrance	Outlaws patrol the approach
Wyndham Village	Substation behind the pub, near St. Katherine’s Church	A Protocol soldier watches the entrance
Casterfell Woods	Take an immediate left after entering from Wyndham and follow the short path	Outlaws occupy the entrance area
Skethermoor	Large central bunker; its entrance is on the southern side in the Protocol camp	Minefields protect the north; guards remain hostile inside

Slatten Dale: Follow a Lead or Head to the Door

IGN’s guide identifies several ways to discover this entrance. Nat Buckshaw can direct you to Molly Jowett, who can mark the rumored location. Alternatively, investigate the convoy wreckage and search Sergeant Hodgkins for his orders.

Molly also offers an atomic battery through barter. Trading with her can reveal another battery lead involving the Vicar in Wyndham.

A good approach is to combine your entrance investigation with supply gathering. Buying a battery before entering means you can continue beyond the initial power restoration without immediately returning outdoors.

Wyndham and Casterfell: Two Ways Into Alpha

In Wyndham, Captain Sims and Iris at The Bakery can provide clues about the restricted substation. Once inside, continue toward the quarantine gate and use your keycard.

The Casterfell entrance is close to the Wyndham connection, but expect Outlaws in its entry room. Both routes eventually approach Data Store Alpha, where infection creates a separate obstacle.

Skethermoor: Understand the Pass’s Limits

Captain Sims can give you a Protocol pass after you gain his trust and accept the task involving Dr. Garrow. IGN describes this as a way to travel through Skethermoor without the usual immediate hostility.

However, the Interchange bunker remains restricted. Its guards can attack regardless of your Protocol allegiance. A good approach is to treat the pass as help with regional travel and prepare separately for the bunker’s turret and patrols.

Restoring the Central Processor and Four Data Stores

The crucial distinction in ATOMFALL the interchange is between restarting the facility and completing it. The bootstrap terminal restores central power; each data store still needs its own atomic battery afterward.

Image: YouTube / Rebellion

From the Slatten Dale gate, move through the construction area and crawl beneath the partially raised door. Continue past the signs for Charlie and Delta toward the Central Processor.

IGN describes dead scientists here carrying notes about the quarantine shutdown. Insert an atomic battery into the Bootstrap System Terminal, located left of the main terminal, then pull the lever on the right.

That lever is part of the procedure. If you have inserted a battery but the facility still appears inactive, check the terminal’s controls before searching for another entrance.

Data store	Approach	Obstacle	What powering it changes
Charlie	Slatten Dale corridor	Requires an atomic battery	Lifts its gates and opens access toward the Medical wing
Delta	Down the hall from Charlie	Requires another atomic battery	Opens the opposite side, including the Robotics lab route
Alpha	Wyndham or Casterfell corridor	Infectious blue spores and hazardous plants	Clears the room’s remaining spores and restores nearby power
Bravo	Skethermoor corridor	Electrical hazards and hanging live wires	Restores the sector and lifts its quarantine restrictions

Charlie and Delta

Return from the processor toward the data store corridors. Charlie becomes accessible after central power is restored. Insert a battery at its terminal to raise the security gates.

If you need another battery, Charlie’s terminal note points toward a dam in Casterfell Woods.

Delta is nearby and uses the same basic process. Its note points toward a vehicle depot in Skethermoor, although any spare atomic battery can power the terminal.

These notes are useful leads when supplies run short. You do not need to fetch a battery from the suggested location if you already have one.

Bravo

After entering through Skethermoor, proceed along the hallway, crawl beneath the propped-open quarantine door, and follow the corridor left toward Bravo.

Watch for hanging live wires. Install a battery at the data store terminal to restore the sector.

A good approach is to handle the approach carefully rather than sprinting through unfamiliar electrical hazards. Saving ammunition here also leaves more supplies for the infected areas ahead.

Alpha

Alpha is the preparation check in ATOMFALL the interchange. Its room contains blue spores that cause infection, while nearby plants can explode and increase the danger.

IGN identifies two protective options: Strange Tonic, obtained through Mother Jago’s lead, and Dr. Holder’s infection resistance serum. Its guide also describes completing Alpha with full health and enough food and bandages, though that demands careful healing and movement.

For the explosive plants, IGN recommends approaching to trigger their reaction, then retreating as they shake and change color.

A good approach is to prepare your protection and healing supplies before entering, since the spores and plant explosions can both threaten your health. If you follow IGN’s trigger-and-retreat tactic, give each reacting plant space before continuing toward the terminal.

Once the terminal receives its battery, Alpha’s gates rise and the remaining spores in the room clear.

Gathering Batteries and Using the Signal Redirector

Battery collection and signal routing solve different problems. Batteries activate the sectors; the Signal Redirector reconnects them to the central system.

Image: YouTube / Rebellion

Player experience: The supplied walkthrough obtains batteries from Molly, a body near the Central Processor, the Vicar’s upstairs church chest, a pool in Skethermoor, and Nora’s trading inventory.

Some of that video’s choices involve killing NPCs. Those choices demonstrate its particular route and do not establish that killing those characters is mandatory. Molly and Nora have trading options in the supplied material.

A good approach is to pursue barter and battery leads before removing characters who offer supplies or information. The game’s official description emphasizes that choices have consequences.

Player experience: The video obtains the Signal Redirector from a locked crate in a Skethermoor bunker, using a keycard collected in an earlier bunker. It then demonstrates the device on electrical equipment and an armory door.

Once you have powered all four stores, return to the Central Processor. The final ATOMFALL the interchange puzzle uses the panels on the floor near the data store corridor entrances.

1. Equip the Signal Redirector.
2. Follow the indicator lights above the corridor entrances.
3. Redirect each store’s signal using its floor panel.
4. Check the main terminal to confirm the connections.
5. Pull the terminal lever.

IGN describes the resulting machinery rising into position and the route toward Windscale opening.

Problem	What to check	Next action
Large entrance gate stays shut	Office terminal above the stairs	Use the Modified Keycard there
Central area remains inactive	Bootstrap battery and adjacent lever	Complete both parts of the startup
Alpha is still infected	Alpha’s battery terminal	Reach and power the terminal with suitable protection
Windscale route remains closed	Store power and signal connections	Finish the stores, redirect their signals, then use the central lever

The terminal check gives you a clear stopping point. If a connection remains incomplete, trace that corridor’s lights and panel before operating the lever again.

Opening Oberon and Preparing for the Next Stage

Completing ATOMFALL the interchange opens the route toward Windscale and Oberon. Your next objective depends on the leads and characters you have chosen to follow.

IGN advises checking those commitments before traveling onward. A good approach is to finish supply runs and review your active leads while the quarantine zone remains convenient to explore.

Before taking the tram, prepare:

• Ammunition for the weapons you intend to carry.
• Bandages, food, and other healing supplies.
• Infection protection for the route you are following.
• Any supplies you need from the dispatch storage system.

IGN describes the completed connection sequence as more than a door opening: terminals rise from the floor, a large power source descends from the ceiling, and the tram provides access toward the Windscale plant and Oberon.

A good approach is to review what your chosen contacts have asked you to do before boarding. IGN specifically recommends understanding the expectations of the NPCs you have aligned with and stocking up on ammunition and healing supplies.

Powering the Interchange is the shared infrastructure task; deciding what to do with Oberon is the story choice that follows.

FAQ

How many atomic batteries does ATOMFALL the interchange need?

The supplied guide describes five battery installations: one at the Central Processor’s bootstrap terminal and one each for Alpha, Bravo, Charlie, and Delta. You can use batteries gathered from different locations.

Do you need to find every Interchange entrance?

Wyndham and Casterfell connect to the same section, so both doors are not required to reach Alpha. Discovering them provides shortcuts. IGN also says the Voice on the Telephone specifically asks you to find all doors when following that lead.

Is Strange Tonic required for Data Store Alpha?

No. IGN describes Strange Tonic and Dr. Holder’s serum as protective options, but also explains that Alpha can be completed with full health, healing supplies, and careful handling of the explosive plants.

Why is the Oberon route still locked after powering the stores?

Powering the stores does not finish the connection process. Return to the Central Processor, use the Signal Redirector on the floor panels, confirm the connections at the main terminal, and pull its lever.