Footstep on concrete: swuing, footstep-concrete.wav.
Source: https://freesound.org/people/swuing/sounds/38873/
Audio: publicly provided high-quality preview https://cdn.freesound.org/previews/38/38873_15613-hq.mp3
License: Creative Commons Attribution 4.0 https://creativecommons.org/licenses/by/4.0/
Files: footstep-hardfloor.wav, jump-takeoff.wav, jump-landing.wav.
Jump derivatives: extra low-pass filtering (2000/1450 Hz), a shortened and faded
impulse for takeoff, full decay for landing; peak and RMS capped at the footstep level.
Changes: mono PCM WAV at 24 kHz; leading silence trimmed; full impact/decay retained;
55 Hz high-pass and 2200 Hz low-pass; peak level adjustment; short edge fades.
Original playback pitch retained in the game.

Door sounds: rubberduck, 100 CC0 SFX.
Source: https://opengameart.org/content/100-cc0-sfx
License: CC0 https://creativecommons.org/publicdomain/zero/1.0/
Files: door-open.wav (door_open.ogg), door-close.wav (door_close_01.ogg).
Changes: mono PCM WAV at 24 kHz, peak normalization and short edge fades.

Grass footsteps: Fission9, Hiking Boot Footsteps on Grass.
Source: https://freesound.org/people/Fission9/sounds/521587/
Audio: https://cdn.freesound.org/previews/521/521587_9395330-hq.mp3
License: CC0 https://creativecommons.org/publicdomain/zero/1.0/
Files: footstep-grass-1.wav, footstep-grass-2.wav, footstep-grass-3.wav.
Changes: first three individual steps trimmed, mono PCM WAV at 24 kHz;
55 Hz high-pass, 6500 Hz low-pass, RMS matched below the hard-floor contact,
5 ms attack and 15 ms release fades. Original playback pitch preserved.

Additional floor profiles: Fission9, CC0.
Stone: https://freesound.org/people/Fission9/sounds/521590/
Wooden planks: https://freesound.org/people/Fission9/sounds/521589/
Gravel: https://freesound.org/people/Fission9/sounds/521588/
Audio: https://cdn.freesound.org/previews/521/{ID}_9395330-hq.mp3
Files: footstep-{ceramic,bath-tile,slate,stone,cobble,asphalt,earth,wood}-{1,2,3}.wav.
Changes: three isolated contacts per source, 24 kHz mono PCM, level matching,
edge fades and material-specific low-pass/resonance/grit treatments. These are
designed floor profiles, not separate field recordings of every finish.
Reproducible processing: tools/prepare-floor-foley.py.
Original playback pitch is preserved; the running player trims/fades tails.

Urinal water: Sheyvan / Philipp Grzemba, Pouring Water (Peeing).
Source: https://freesound.org/people/Sheyvan/sounds/540236/
Audio: https://cdn.freesound.org/previews/540/540236_3248005-hq.mp3
Urinal flush: kyles, urinal flush roomy aimed at wall, closeup, and super-closeup.flac.
Source: https://freesound.org/people/kyles/sounds/455843/
Audio: https://cdn.freesound.org/previews/455/455843_612689-hq.mp3
Both licensed CC0: https://creativecommons.org/publicdomain/zero/1.0/
Files: urinal-stream.wav, urinal-flush.wav.
Changes: mono PCM WAV at 24 kHz, 90 Hz high-pass / 6500 Hz low-pass,
level matching and edge fades. Stream excerpt 35-38.4 seconds; flush combines
attack, rush and drain excerpts with 60 ms crossfades. Original pitch retained.
Reproducible processing: tools/prepare-urinal-foley.py.

Sink water: OwlStorm / Ashe Kirk / Owlish Media, Tap Water 1.
Source: https://freesound.org/people/OwlStorm/sounds/212177/
Audio: https://cdn.freesound.org/previews/212/212177_140737-hq.mp3
License: CC0 https://creativecommons.org/publicdomain/zero/1.0/
File: sink-water.wav. Excerpt 2-6 seconds, mono PCM WAV at 24 kHz,
90 Hz high-pass / 6500 Hz low-pass, level matching, 80 ms loop crossfade.
Original pitch retained. Processing: tools/prepare-sink-foley.py.

Toilet flush: lorenzgillner, Toilet Flushing.
Source: https://freesound.org/people/lorenzgillner/sounds/274448/
Audio: https://cdn.freesound.org/previews/274/274448_5169846-hq.mp3
License: CC0 https://creativecommons.org/publicdomain/zero/1.0/
File: toilet-flush.wav. Full recording, mono PCM 24 kHz, 65 Hz high-pass /
7000 Hz low-pass, level matching and edge fades; original pitch retained.
Processing: tools/prepare-toilet-foley.py. Seated use reuses urinal-stream.wav above.

Shower Water Running.wav — TheRandomSoundByte2637
https://freesound.org/people/TheRandomSoundByte2637/sounds/650588/
CC0 1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Edited: mono 24 kHz, equalized, normalized, seamless 3.92-second loop.