Control Resonant Underpass Exploration Locations

The Roots Of The Oldest House? document is the 20th collectible in the Underpass Exploration Set. It is found on a table in the corridor you'll have to cross while playing the Maintenance Protocol Side Quest, past the "Old" Oldest House Locked Door.

It is a decades-old FBC document discussing the depths below the Oldest House.

The On The Oldest House’s Form document is the last collectible in the Underpass Exploration Set. It is found on a table in the upper offices area you'll have to explore while playing the Maintenance Protocol Side Quest, past the "Old" Oldest House Locked Door.

It is an old FBC document theorizing about the form of the Oldest House.

A Half-Filled Form is the first collectible in the Underpass Exploration Set. It is found on a blue crate on the red roof of the spire pillar in the Underpass area.

It is an FBC equipment requisition form that was never fully completed.

Schultz Expedition Log #1 is a collectible in the Underpass Exploration Set. If you listen to it, you'll hear Schultz talk about setting up camp. The recording is found on the roof of the Spire in the Underpass. Look for it on a blue desk on the southeastern side of the large pillar.

Ayad Engineering Log #1 is an audio log in which Ayad reports unexpected wear and tear on the equipment. It is also a collectible in the Underpass Exploration Set. You'll find it in the small camp on the large stone block southwest of the Spire, in the Underpass.

Steinbeck Psychiatry Report #1 is a collectible part of the Underpass Exploration Set. The Audio Log includes Dr. Steinbeck's notes on the mental state of the team and is found in the central section of the Underpass Research Site. Look for it on the table near the dead researchers.

The Initial Findings document in the Underpass Exploration Set includes Dr. Melanie Grist’s initial notes on the anomaly in the Underpass. The document is found in the Underpass Research Site office, where you can also find the Wardrobe. Look for it on the cabinet by the wall.

Grist Research Log #1 is another audio log from the Underpass Exploration Set. It is found in the Underpass Research Site office, where you can also find the Wardrobe. Look for it on the desk by the northern door.

In the log, Dr. Grist observes the ineffectiveness of Black Rock against the Patterning.

The Notes On Team Psychology collectible in the Underpass Exploration Set is found on a desk in the western Underpass Research Site office. It includes Dr. Maria Steinbeck’s notes on the team members’ mental health.

Grist Research Log #2 is another audio log in the Underpass Exploration Set, and it reveals Dr. Grist concerns that the Patterning has been getting worse over the past year.

It is found on the ground, next to a sleeping bag in the eastern office of the southern Underpass Research Site.

The Unable to Contact Pope document in the Underpass Exploration Set is found in the Southern Underpass Research Site. In it, Agent Schultz writes about their ongoing radio issues and missing abseiling equipment. Look for it in the southern office, by the door.

Steinbeck's Psychiatry Report #2 from the Underpass Exploration Set is an audio log in which Dr. Steinbeck discusses the memory issues the team appears to be having.

It is found in the Southern Underpass Research Site by the back wall of the southern office.

The Persistent Memory Issues document reveals that Dr. Maria Steinbeck has determined that the team’s memories are affected. The document is another collectible in the Underpass Exploration set, and it is found on a table in the center of the southern Research Site office.

Ayad Engineering Log #2 is an audio log in which Ayad talks about picking up transmissions even though the radio tower has been destroyed. It is one of the collectibles in the Underpass Exploration Set that you can retrieve from the desk in the western office of the third Underpass Research Site.

The third Schultz Expedition Log is found in the central office of the western Underpass Research Site. In it, Schultz records his final message. The collectible is found on a desk next to some yellow chairs.

Morale’s In The Toilet is another collectible found in the western Underpass Research Site. It sits on a blue FBC crate by the wall of the central office. In the document, Agent Schultz discusses the team’s failing morale under impossible conditions.

Notes On Patterning/Spacetime is a timed collectible from the  Underpass Exploration Set. It spawns on the table behind Dr. Melony Grist, but only after you find her on the terrace of the third Underpass Research Site.

The folder includes Dr. Melanie Grist’s notes on Patterning-related spacetime distortions and her own mental state.

Our Memories Aren’t The Problem is another timed collectible from the Underpass Exploration. It sits on the desk behind the whiteboard in the western Underpass Research site office. Look for it immediately after finding Dr. Melony Grist.

Schultz Expedition Log #2 is another timed collectible and an audio log in the Underpass Exploration set. It is found near the trash bags behind the offices of the main Underpass Research Site; however, be advised that it spawns only after you speak to Dr. Melony Grist for the first time.

In the audio log, Schultz talks about hearing strange noises in the void.

Grist Research Log #3 is also a timed collectible from the Underpass Exploration. The audio log spawns on the ground in the western Underpass Research Site after you meet Ayad during the Recursions and Iterations.

I recommend looking for it after you restore the power. The log reveals that, despite having had to bury all of her teammates, Dr. Grist still intends to go on.