Pipehell bunkercore/city exploration

Couple of games with a strong city exploration element along with appropriately claustrophobic cluttered spaces, lots of concrete, neverending cables and/or a bunch of pipes.

NaisssanceE

Steam (free!)

Genre: walking simulator, puzzle
Playtime: 4-5 hours

Explore a strange blocky world, accompanied by no one but yourself and your own breaths. It's like playable Blame! by Nihei Tsutomu, just without the action bits. Mostly.

Stray

Steam | PS4 | Xbox X

Genre: walking (running?) simulator, adventure
Playtime: 5-7 hours

Cat game set in a Kowloon Walled City inspired environment, and some fleshy body horror on top. There's a dedicated meow button.

Babbdi

Steam | Itch (free!)

Genre: walking simulator
Playtime: under an hour

Your average commieblock neighbourhood. Find a way out. Or scale buildings with a leaf blower, you can do that too. Reminds me of my childhood.

Cloudpunk

Steam | GOG | PS4 | Xbox One | Nintendo Switch

Genre: walking/driving simulator
Playtime: technically 10-12 hours for the base game, easily over 20 when actually exploring the city

This one is a lot more vibrant, but also incredibly fun to explore. Taxi people around the city, listen to their stories, run errands. Pretty neat cyberpunk writing with some great over the top delivery, excellent soundtrack.