Atomfall: Infiltrators Investigation Walkthrough

As you explore the world of Atomfall, you're likely to find hints of Soviet spies trying to unravel the mystery of what the British government is trying to hide inside the Quarantine Zone. Notes from a mysterious handler called Agravaine, directing the agents to drop points and safehouses, appear early on, but the spies themselves are nowhere to be seen.

Investigating these infiltrators will let you help yourself to their supplies, and following the trail all the way to the end could lead to information that could help you escape the Zone.

Slatten Dale

You can find the first mention of Agravaine almost immediately upon leaving Bunker L8 at the beginning of the game. If you take the right-hand path from the phone box, heading east, you'll come upon a crashed helicopter. Inside is a body and a coded message from the spymaster, instructing the infiltrators to retrieve emergency supplies from the nearby railyard.

The body also has Agravaine's Key, which opens the locked box containig the supplies and the sewer grate, an entrance to the Sewer Tunnels that you can use in lieu of the main entrance that you would unlock with Molly's key.

The Railyard Drop Point

The supply cache that Agravaine's coded message refers to is in the railyard north of the crash site. You can't go straight north, so you'll need to either take the long way along the western road, or cut through the nearby Slate Mine Caves and pass through the Outlaw Camp. The latter route is much more dangerous, especially early in the game.

When you reach the railyard, look for the small building at 28.7E, 77.5N. The door is locked, but the sliding door at the rear is open just enough that you can crawl under it. Outlaws patrol this area, so make sure the coast is clear first!

Open the box on the table to the left; it will give you your next destination, a set of coordinates in Casterfell Woods, as well as the crafting recipe for Sticky Bombs.

Casterfell Woods

You don't have to use the tunnel route mentioned in Agravaine's note to reach Casterfell Woods - you can also get there by cutting through Wyndham Village, and doing so will actually drop you off a bit closer to where you need to go.

The coordinates on the letter (27.0E, 90.6N) lead to a cellar under the Garden Centre. Beware of druids and infected hornets' nests as you approach the entrance.

Once you're inside, look for a gap in the right-hand wall that you can squeeze through on the right. This leads to the spies' saferoom. Read the two notes on the left, then crawl through the vent in the floor to Sergeant Kozlov's room. There, you'll find a note hinting at his whereabouts and a BARD Crate containing a Training Stimulant, Poison, and some SMG Ammo.

Kozlov's map has an abandoned manor in Skethermoor - one of the most dangerous regions in the zone - circled, so that's your next stop.

Skethermoor

The entrance to Skethermoor nearest to Brinsop Manor is from Wyndham Village, but the guards won't let you pass. If you want to get to Skethermoor without causing an incident, it's safer to go the long way through the Slate Mine Caves in Slatten Dale - just watch out for the robots as you make your way north, and stay away from Protocol checkpoints.

Brinsop Manor is at 39.7E, 77.9N, but the entrance to the cellar is in the mansion's hedge maze. Luckily, it's actually pretty easy to reach. Enter the main building and climb through the back window of the left-hand room to reach the garden. Keep left, using the Metal Detector to pick up a cache while you're at it. This counterclockwise route should take you straight to the cellar.

Inside, keep your weapons holstered and make your way to the lit room at the back. Kozlov is wary of strangers, but if you show him the notes you've collected and mention Agravaine, he'll be willing to work with you.

Repairing The Radio

Kozlov will ask you for 10 Scrap and 4 Glue so that he can fix his transmitter to try and signal Agravaine for an evacuation. When you have the materials, give them to him, and he'll reward you with a grenade and five rounds of pistol ammo.

Ilya will tell you to come back when the radio is repaired. The next time you visit the cellar, he'll be gone, but a note will be on the table saying that he couldn't get through the interference field and set out to find his own way out of the Zone. Take any supplies that he left behind - the investigation is over, so you may as well get what you can out of it.

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