Online co-op Aliens games

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

Showing 31–40 of 138 games matching Aliens · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
94% of 17

17.waves is an online co-op tower defense game for up to four players. Strategize with your teammates to build, upgrade, and maintain your towers to defend your base from hordes of invading aliens.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
76% of 13

A deep biological network automation game where you grow a living mycelial network across an alien planet. Consume the local flora and creatures, build biological production chains, and evolve from a tiny spore into a cosmic entity that consumes worlds.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players

1–4 player co-op survival where you fight through waves of enemies, rack up kills, and collect powerful pickups to stay alive as long as possible. Fast-paced, chaotic runs push your limits every time.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
93% of 849

Strategic auto battler where you design a heavily-armed spaceship. Draft 200+ items, outfit your hull, and unleash it in async PvP. Blend captains and factions for absurd combos and galactic domination. Roll, buy, place, pray.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

"Infiltrate mysterious planetary facilities to snatch the core 'Hug-Dung' and escape. Battle giant robots and alien creatures in 4-player co-op, secure the core, and return to the extraction pod in this sci-fi action experience."

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 11

🐱🚀 Find 2,000 hidden cats across 20 cosmic maps 🌌. Relax with guided color-by-numbers 🎨. Play solo or online co-op 👯‍♂️, while Meow FM 🎶 sets the galactic mood.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

A co-op horror game for up to 4 players where you explore abandoned facilities. Your mind can be plugged into random electric devices. Can you survive as a fridge? A vacuum cleaner? Scavenge valuable hardware and escape the terror.

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

HexSwarm: Hostile Worlds is a faithful adaptation of the board game by the same name. You and your friends will tackle building a prosperous and successful colony on a planet that does not want you there. You'll face hazards at every turn; untold amounts of bugs, and a mind bending movement map.

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$
Released
Price
$ · Cheap
Players
👥 Not stated

You find yourself all alone in the vastness of outer space! Being alone makes you slow and weak. Take your Linky with you and confront the challenges head-on! Linkies is a co-op game that creates unbreakable bonds and makes you faster and stronger! Can you make it to the end of space?

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