https://freesound.org/people/JavierZumer/sounds/257226/ (Box Error)

https://freesound.org/people/plasterbrain/sounds/396193/ (Box Verified)

https://freesound.org/people/thanvannispen/sounds/9665/ (Whispers from the VHS Tape Video)

https://freesound.org/people/Ranner/sounds/488534/ (Clicking a Box Track)

https://freesound.org/people/ShadowSilhouette/sounds/489725/ (Setting the box track)

https://freesound.org/people/kwahmah_02/sounds/250775/ and https://freesound.org/people/InspectorJ/sounds/415873/ (Office Lights)

https://freesound.org/people/groovyrandomness/sounds/171257/ (Cam Static, also used in the VHS Tape Video)

https://freesound.org/people/InspectorJ/sounds/418387/ (Office Monitor Static (very quiet to prevent the sound from being drilled into one's ears))

https://freesound.org/people/kemitix/sounds/41868/ (Hiding under the desk)

https://freesound.org/people/plagasul/sounds/26837/ (Ambiance 1)

https://freesound.org/people/ERH/sounds/32422/ (Ambiance 2)

https://freesound.org/people/BMacZero/sounds/94129/ and https://freesound.org/people/BMacZero/sounds/94133/ (Open Monitor)

https://freesound.org/people/BMacZero/sounds/94134/ (Close Monitor)

https://freesound.org/people/kikuchiyo/sounds/214851/ (Reboot Monitor Open and Close)

https://freesound.org/people/danieldouch/sounds/466556/ (Select Blip and Rebooting Sound)

https://freesound.org/people/copyc4t/sounds/336557/ (Rebooted Sound)

https://freesound.org/people/kev_durr/sounds/396470/ (Flashlight Flickering)

https://freesound.org/people/kaumodaki/sounds/245773/ (LBM Shipments Catalog Ambiance)

https://freesound.org/people/Artmasterrich/sounds/345459/ (I think breathing under the desk)

https://freesound.org/people/SirBedlam/sounds/393824/ (Animatronic Out the Window Scare)

https://freesound.org/people/filip_stefanowski/sounds/323803/ (Animatronic Out the Window Ambiance)

https://freesound.org/people/ceberation/sounds/235519/ (Breathing After Finding Animatronic Out the Window)

https://freesound.org/people/dav0r/sounds/346932/ (Animatronic Breathing in Minigames)

https://freesound.org/people/fennelliott/sounds/379416/ (Phone Call from Michael)

https://freesound.org/people/waveplay./sounds/187498/ (Archive)

https://freesound.org/people/creek23/sounds/75235/ (Buying from the Shop)

https://freesound.org/people/jacobsteel/sounds/243607/ (Task Complete!)

https://freesound.org/people/kyles/sounds/453434/ (Forklift Whirr from Popo's Minigame)

https://freesound.org/people/JimmyJimJim1234/sounds/453377/ (You'll Know This When You Beat the Game, WARNING: LOUD)

https://freesound.org/people/Pfannkuchn/sounds/360629/ (Maybe Minigame Ambience? I don't know if IvanG used this.)

https://freesound.org/people/Handfan/sounds/71237/ (Moving Behind in Minigames)

https://freesound.org/people/LightYarn/sounds/173420/ (Light On)

https://freesound.org/people/LightYarn/sounds/173419/ (Light Off)

That's all I could find for this game.