Underpass Exploration is one of the collectible bundles in the Control Resonant Archives, with 21 documents and recordings in the Underpass. Most of them turn up during the story quest Recursions and Iterations, when Dylan returns to the bottom of the Sinkhole in the Evacuation Zone to find a missing research team, and the last two are in the Oldest House during the Maintenance Protocol side story after the main story. Here is every location in the same order as the in-game menu.
Related Guides:
Underpass Accounts Collectibles
Jesse Faden Collectibles
Dig Site Threshold Collectibles
Evacuation Efforts Collectibles
Subway Maintenance Collectibles
West Incursion Records Collectibles
Prime Candidate Program Collectibles
Astral Plane Breach Collectibles
Ordinary AWE Collectibles
Zoe’s Mixtape Collectibles
Control Resonant Game Guides & Collectibles Hub
- 1 – Schultz Expedition Log #1
- 2 – A Half-Filled Form
- 3 – Ayad Engineering Log #1
- 4 – Grist Research Log #1
- 5 – Schultz Expedition Log #2
- 6 – Steinbeck Psychiatry Report #1
- 7 – Notes On Team Psychology
- 8 – Initial Findings
- 9 – Grist Research Log #2
- 10 – Steinbeck Psychiatry Report #2
- 11 – Unable To Contact Pope
- 12 – Persistent Memory Issues
- 13 – Ayad Engineering Log #2
- 14 – Grist Research Log #3
- 15 – Schultz Expedition Log #3
- 16 – Notes On Patterning/Spacetime
- 17 – Morale’s In The Toilet
- 18 – Our Memories Aren’t The Problem
- 19 – Steinbeck Psychiatry Report #3
- 20 – The Roots Of The Oldest House?
- 21 – On the Oldest House’s Form
1 – Schultz Expedition Log #1
Location: The Spire, Underpass
Collectible Category: Underpass Exploration (1 of 21)
Description: Schultz talks about setting up camp.
Schultz Expedition Log #1 is at The Spire, in the same area as A Half-Filled Form (number 2), a bit further up to the left.
2 – A Half-Filled Form
Quest: Recursions and Iterations
Location: The Spire, Underpass
Collectible Category: Underpass Exploration (2 of 21)
Description: An FBC equipment requisition form that was never fully completed.
Follow the ropes in the story quest Recursions and Iterations to a research area with tents at The Spire, near the Underpass Resonant location. A Half-Filled Form is on the table here.
3 – Ayad Engineering Log #1
Location: Underpass
Collectible Category: Underpass Exploration (3 of 21)
Description: Ayad reports unexpected wear and tear on the equipment.
Ayad Engineering Log #1 is just north of the Halfway Trail Fast Travel Door, on top of a computer desk.
4 – Grist Research Log #1
Location: Research Site, Underpass
Collectible Category: Underpass Exploration (4 of 21)
Description: Dr. Grist observes the ineffectiveness of Black Rock against the Patterning.
Grist Research Log #1 is on the southern side of Research Site, in the same room as the Player Customization box.
5 – Schultz Expedition Log #2
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (5 of 21)
Description: Schultz talks about hearing strange noises in the void.
Schultz Expedition Log #2 is at …Research Site?, west of Research Site, near the garbage bags. These are the same garbage bags as Waste Disposal from the Underpass Accounts collectibles, so you can grab both at once.
6 – Steinbeck Psychiatry Report #1
Quest: Recursions and Iterations
Location: Research Site, Underpass
Collectible Category: Underpass Exploration (6 of 21)
Description: Dr. Steinbeck’s notes on the mental state of the team.
Steinbeck Psychiatry Report #1 is right next to the research team Dylan finds at Research Site during the story quest Recursions and Iterations.
7 – Notes On Team Psychology
Location: Research Site, Underpass
Collectible Category: Underpass Exploration (7 of 21)
Description: Dr. Maria Steinbeck’s notes on the team members’ mental health.
Notes On Team Psychology is on the western side of Research Site. Ayad Transmission from the Underpass Accounts collectibles is on the same side.
8 – Initial Findings
Location: Research Site, Underpass
Collectible Category: Underpass Exploration (8 of 21)
Description: Dr. Melanie Grist’s initial notes on the anomaly in the Underpass.
Initial Findings is on the southern side of Research Site, close to the Player Customization box.
9 – Grist Research Log #2
Location: Another Research Site, Underpass
Collectible Category: Underpass Exploration (9 of 21)
Description: Dr. Grist is concerned that the Patterning has been getting worse over the past year.
Grist Research Log #2 is at Another Research Site, south of Research Site, in the same room as the Player Customization box. Frequent Disagreements from the Underpass Accounts collectibles is in this room too.
10 – Steinbeck Psychiatry Report #2
Location: Another Research Site, Underpass
Collectible Category: Underpass Exploration (10 of 21)
Description: Dr. Steinbeck discusses the memory issues the team appears to be having.
Steinbeck Psychiatry Report #2 is in the southern office at Another Research Site.
11 – Unable To Contact Pope
Location: Another Research Site, Underpass
Collectible Category: Underpass Exploration (11 of 21)
Description: Agent Schultz writes about their ongoing radio issues and missing abseiling equipment.
Unable To Contact Pope is in the same southern office at Another Research Site as Steinbeck Psychiatry Report #2.
12 – Persistent Memory Issues
Location: Another Research Site, Underpass
Collectible Category: Underpass Exploration (12 of 21)
Description: Dr. Maria Steinbeck has determined that the team’s memories are affected.
Persistent Memory Issues is the third document in the southern office at Another Research Site.
13 – Ayad Engineering Log #2
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (13 of 21)
Description: Ayad talks about picking up transmissions even though the radio tower has been destroyed.
Ayad Engineering Log #2 is at …Research Site?, west of Research Site, in the same room as the Player Customization box.
14 – Grist Research Log #3
Quest: Recursions and Iterations
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (14 of 21)
Description: Despite having had to bury all of her teammates, Dr. Grist still intends to go on.
After talking to Dr. Grist at Another Research Site in the story quest Recursions and Iterations, return to …Research Site? in the west. Grist Research Log #3 is on the floor in the center. You have to pick it up to advance the story.
15 – Schultz Expedition Log #3
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (15 of 21)
Description: Schultz records his final message.
Schultz Expedition Log #3 is inside the office on the northern side of …Research Site?.
16 – Notes On Patterning/Spacetime
Quest: Recursions and Iterations
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (16 of 21)
Description: Dr. Melanie Grist’s notes on Patterning-related spacetime distortions and her own mental state.
Notes On Patterning/Spacetime is in the center of …Research Site?. This is where Dylan finds Schultz first alive, then dead, during the story quest Recursions and Iterations.
17 – Morale’s In The Toilet
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (17 of 21)
Description: Agent Schultz discusses the team’s failing morale under impossible conditions.
Morale’s In The Toilet is in the same office as Schultz Expedition Log #3.
18 – Our Memories Aren’t The Problem
Location: …Research Site?, Underpass
Collectible Category: Underpass Exploration (18 of 21)
Description: Dr. Maria Steinbeck starts to understand the true nature of their memory problem.
Our Memories Aren’t The Problem is also at …Research Site?, in the same room as the Player Customization box and Ayad Engineering Log #2.
19 – Steinbeck Psychiatry Report #3
Location: Research Site… Again, Underpass
Collectible Category: Underpass Exploration (19 of 21)
Description: Dr. Steinbeck has seen herself, and found the experience liberating.
Cross the chasm with the cable car to reach Research Site… Again, far east of Research Site. Steinbeck Psychiatry Report #3 is in the center area, where the researchers usually stand. Scrawled Note from the Underpass Accounts collectibles is at this research site too.
20 – The Roots Of The Oldest House?
Quest: Maintenance Protocol (Side Story)
Location: Underpass – Oldest House
Collectible Category: Underpass Exploration (20 of 21)
Description: A decades-old FBC document discussing the depths below the Oldest House.
After you finish the main story, Zoe calls Dylan to a briefing at the watchtower. This starts the Maintenance Protocol side story. Enter the Oldest House through the door near the sapling in the Underpass. The Roots Of The Oldest House? is in the first lobby room.
21 – On the Oldest House’s Form
Quest: Maintenance Protocol (Side Story)
Location: Underpass – Oldest House
Collectible Category: Underpass Exploration (21 of 21)
Description: An old FBC document theorizing on the form of the Oldest House.
The last Underpass Exploration collectible is just upstairs from The Roots Of The Oldest House?, inside the office with the Power Upgrade box.
About Control Resonant
Sequel to: Control (2019)
Release: September 24th, 2026
Developer: Remedy Entertainment
Publisher: Remedy Entertainment
Official Website: https://www.remedygames.com/
