Atomfall presents players with six distinct endings, and one pivotal figure in your quest for escape is Captain Grant Sims. Within the game’s quarantine zone, players must delve into the enigma surrounding the Interchange, the clandestine facility behind the catastrophe, while charting a path to freedom.
For a comprehensive understanding of the narrative, players are encouraged to engage with characters such as Dr. Garrow and Dr. Alan Holder and accomplish specific objectives. However, if your goal is solely to uncover snippets of the storyline while making your escape, you can opt for any of the six available routes.
This guide will detail the missions and objectives provided by Captain Grant Sims, aimed at facilitating your escape in Atomfall.
Walkthrough for Captain Grant Sims’s Main Mission
At the outset of your adventure, you will meet a scientist clad in a hazmat suit who enlists your help to investigate the Interchange. He will provide you with a modified keycard, granting access to restricted areas.
Finding Captain Sims
Upon leaving the bunker, you will enter Slatten Dale. Take a left and approach two dilapidated structures. Inside the rightmost building, you will encounter Nac, who will share information about a concealed settlement known as Wyndham Village and where to find its entrance. Nac will also mention Molly, a trader residing in Slatten Dale.
Next, proceed to Wyndham Village to locate Captain Grant Sims at the Village Green. When you interact with him, he will invite you to follow him into the Village Hall. Inside, he will request assistance in investigating peculiar activities occurring in the vicinity, seeking to build your trust.
Begin your investigations with a visit to the Church, where you will witness a murder. Report back to Captain Sims afterward. Following this, he will ask you to gather information from Dr. Garrow regarding a peculiar device called the Signal Redirector, which is presently in the custody of Skethermoor Prison.
Obtaining the Signal Redirector from Skethermoor Prison
With Captain Sims’s permission, the guards and Protocol Army within the prison will not view you as a threat. Head to the prison’s lowest level to find Dr. Garrow.
- Engage her in dialogue to collect vital information.
- She will disclose that the Signal Redirector is located in the Security Room, just north of her cell.
- Retrieve the device and return to Wyndham Village to update Captain Sims in the Village Hall.
Following your report, Sims will task you with procuring a stolen radio part.
Acquiring the Protocol Radio Part – The Speaking Cave in Casterfell Woods
- Head to Casterfell Woods via the northwestern exit of Wyndham Village (coordinates: 29.6E, 83.6N).
- Once inside the woods, proceed west towards The Speaking Cave (coordinates: 23.0E, 85.4N), and look for a door beneath a hill.
- Expect to encounter hostile druids; defeat them strategically to proceed.
- Move further until you discover a large branched statue. Behind it, on an elevated area, lies a door to an offering room.
- Inside this room, collect the Protocol Radio Part and make your way back to Captain Sims.
Upon your return, Sims will give you a final mission: destroying Oberon, the alien meteor responsible for the calamity you are trying to escape.
Activating the Interchange
To access Oberon, it’s imperative to first activate the Interchange and unlock the entrance to the Windscale Plant.
The Interchange features four entrances located at:
- Slatten Dale: 31.0 E, 77.8 N
- Wyndham Village: 33.8 E, 78.3 N
- Skethermoor: 39.6 E, 73.1 N
- Casterfell Woods: 27.6 E, 83.6 N
Collecting Atomic Batteries
Before venturing inside, ensure you gather at least four Atomic Batteries, which are critical for your mission. Here are effective methods for acquiring them:
- Defeat robots – Each robot comes equipped with Atomic Batteries, so take them down to collect the battery, though they can be challenging foes.
- Trade with Molly (Slatten Dale) – Either trade her an Atomic Battery or eliminate her to loot one.
- Solve the murder mystery at St. Katherine’s Church – Successfully unraveling this mystery rewards you with a chest key that unlocks a chest containing a battery. Alternatively, you might kill the Vicar to obtain the key.
- Find a broken robot in Skethermoor – Look for it near Nora’s Camp, submerged underwater.
- Trade with Nora (Skethermoor) – Either trade a battery from her or eliminate her to take one.
- Greenhouse Landmark (Vehicle Storage Bunker) – Locate the Storage Room Keycard on a bunk bed; use it to unlock a room containing a battery.
Powering Up the Interchange
- Enter the Interchange via the Slatten Dale entrance and navigate to the Central Processing Center.
- Inside, retrieve an additional Atomic Battery and insert it into the console to energize the Interchange.
- Power up the four Data Centers: Alpha, Bravo, Charlie, and Delta.
- Entrances and Corresponding Data Centers:
- Slatten Dale Entrance – Power up Charlie and Delta.
- Skethermoor Entrance – Activate the Alpha Data Center.
- Wyndham Village Entrance – Energize the Bravo Data Center.
- After all Data Centers are operational, return to the Central Processing Room.
- Utilize the Signal Redirector to establish connections with the power lines linking to the processing console.
- Once everything is in place, pull the lever to activate the Interchange and gain access to the Windscale Plant.
Eliminating Oberon
- Once inside the Windscale Plant, exercise caution as alien substances abound and can infect you. Move swiftly to avoid exposure.
- Anticipate the presence of infected enemies; you can either defeat them or navigate past them.
- Eventually, you will arrive at a door leading to the Oberon Dig Site.
- Inside, you will discover the dig site and a building to your left.
Activating the Explosives
- Watch out for hostile robots within the dig site and neutralize them as needed.
- Locate the four explosives scattered around the area and activate each one.
- Head into the control room of the building.
- Finally, pull the self-destruct lever to eliminate Oberon.
Making Your Escape to Skethermoor Camp
- After successfully destroying Oberon, make your way back to the Interchange.
- You will receive directives indicating that Captain Sims is currently at Skethermoor Camp.
- Navigate to Skethermoor where you will find a plane ready for takeoff.
- Board the aircraft alongside Sims to conclude the game.
This comprehensive guide encapsulates all you need to know concerning Captain Grant Sims’s mission walkthrough in Atomfall.