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 41–47 of 47 games matching Underground · updated 12 Oct 2026

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

"In an age of guns, swords, and magic, the Philosopher's Stone, which maintains the balance of Dungeons and Dragons, has been stolen. The world hangs in the balance. It's all up to you..." Honestly, we can't make it all up all the time. Let's have an adventure together!

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$$
Released
Price
$$ · Standard
Players
👥 Not stated

As a player you'll step into the shoes of either a foreign subversive agent or an Albanian patriot, each with their own mission objectives. Will you infiltrate a key facility, engage in high-stakes firefights, or coordinate with fellow players to spark a rebellion against the oppressive regime?

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
17% of 17

Beneath The Earth - Backrooms is a Co-Op horror game that can be played with at least 1 and up to 4 players. Where you and your friends will fight to escape from the different levels of the backrooms, solving different puzzles.

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$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
89% of 2,591

Unleash your inner miner as you commandeer a high-tech Mining Mech! Mine for valuable resources and upgrade your mech for even bigger hauls as you explore the underground. Fun to play alone or with up to 7 friends in online co-op multiplayer!

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

Welcome to this multiplayer survival sandbox game! In this world, you will need to establish your own survival base from scratch, collect materials, make tools, build towns, manufacture weapons, explore unknown fields, and so on. You can team up with other players and survive together, as well as en

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Free
Released
Price
Free
Players
👥 1–10 players
Reviews
92% of 3,816

Cave Crawlers is a 1-10 player rogue lite set deep underground in a system of randomly generated caves. Players use weapons, spells, and talents to defeat the unique bosses and enemies found in each biome.

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