Online co-op Base Building games

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

Showing 281–290 of 464 games matching Base Building · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
76% of 437

Warlords Under Siege is a mix of RTS and Roguelike genre, where you build a small city and defend it against continuous waves of enemies. Improve your assortment of weapons with each playthrough, unlocking new possibilities to beat the ever-increasing threat.

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$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
67% of 74

Welcome to "Crazy Islands", a 3D survival game for 1-4 players that takes you into a world full of mystery and challenges. On this isolated archipelago, you will face ancient gods, cruel natural environment and unknown dangers. Only wisdom and courage can help you survive in this unknown land.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
69% of 204

In a post-apocalyptic world submerged by the sea, the wake of the enemy is apparent at every turn. From turning the tides of naval warfare to dominating the skies in break-neck aerial combat, every decision you make will change the outcome of the battle.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players
Reviews
82% of 3,081

Soar the skies in Aloft, the co-op sandbox survival game set in a world of floating islands. Build any island into a skyship, your home in the clouds. Find lost knowledge, cure the fungal corruption, and brave the hurricane to restore the ecosystem.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
74% of 9,522

Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
68% of 67

You are just an ordinary person, with only a small boat serving as your home, struggling to find a way to survive in the ruthless ocean of the post-apocalyptic world.

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$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
100% of 9

A homage to classic real-time strategy games. Gather resources, build an empire, and command powerful armies to conquer the world. Lead six unique tribes, expand your territory, and engage in epic battles with hundreds of units on screen. Dominate in 18 missions and procedurally generated maps!

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Ignisia is a magical world where majestic dragons and other mysterious creatures live in harmony, protecting their lands from the forces of darkness. However, not all the secrets of this world are revealed at once — some of its inhabitants remain hidden in the shadows, waiting for their time.

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$
Released
Price
$ · Cheap
Players
👥 1–2 players
Reviews
100% of 5

Mine resources, craft tools, and battle fierce underground enemies as you explore, trade, and build your way back to the stars. Level up, upgrade your gear, and automate your processes for ultimate efficiency. Play solo or team up with a friend in this 1-2 player mining and combat adventure.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 2

[The Gears: Factory] is a third-person 3D factory-building game where the player's main goal is to build automated systems by mining minerals and producing industrial units.

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