Online co-op Underground games

Every online co-op Underground game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 1–10 of 47 games matching Underground · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated

Run your own tattoo shop and actually do the tattooing. Dial in voltage and needle depth, line it, shade it, wipe the blood — and keep the customer from walking out. Too shallow and the ink won't hold. Too deep and you'll hear about it.

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$$
Released
Price
$$ · Standard
Players
👥 1–6 players

A sandbox survival crafting collectathon for 1-6 players set in an endless series of interconnected floating islands that are a mix of hand crafted and procedurally generated voxel environments.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
82% of 69

1923. You owe a gangster money. The answer is buried beneath Devil Reef — if the horrors lurking in the dark don’t claim your mind first. A Lovecraftian co-op roguelite for 1–4 players where your sanity is the real final boss.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
98% of 322

Hardcore, co-op (or solo) platformer. Dark Souls makes a baby with Super Monkey Ball. An easy-to-learn, hard-to-master experience to explore with your friends. All inside a vast open world, with each platforming course bringing its own twist.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 5 players
Reviews
75% of 986

Build a criminal empire from a hidden underground hangar. Produce drugs, craft weapons, print fake money, operate cartel airstrip and more. Hire workers, expand your gang, upgrade your base and take control of city distribution solo or in co-op.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
80% of 121

Officially licensed by Nan Pai San Shu, this authentic tomb-raiding MMO brings the novel’s world to life. Venture into the Seven-Star Lu Palace, Nine-Headed Cypress, Bronze Gate and more—iconic locations recreated in stunning detail.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
0% of 1

Work together to operate a giant underground drilling machine. Mine valuable resources, survive unexpected machine failures, upgrade your machine, and make it back to the surface before everything falls apart.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
33% of 9

Internal Incident – a top-down survival horror extraction shooter. Explore the hidden corners of a vast facility in search of resources while fighting off terrifying creatures lurking in the dark. Unveil the secrets of the abandoned complex and do everything you can to make it out alive.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
83% of 12

Sewer Raiders is a horror exploration puzzle game where players descend into massive underground tunnels, solve puzzles, scavenge loot, and flood the infested sewer. Every run is unpredictable, hidden paths, and dangers lurking in the dark.

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