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 131–140 of 464 games matching Base Building · updated 12 Oct 2026

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Reviews
87% of 8

Experience infinite voxel based fantasy home decorating in multiplayer or solo with pets! No unlocks, no limits, no enemies, just relax and build freely.

If you loved these, you'll love this

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👥 1–4 players
Reviews
71% of 258

An immersive medieval dark fantasy survival game with RPG elements for 1-4 players. Set in a hand crafted open world. Explore, survive, build, craft, fight and conquer your way through the dark, brutal and mysterious lands.

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$ · Cheap
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👥 Not stated
Reviews
92% of 115

Riftborne is a classic terminal based, real time, grand strategy game. Construct space ships. Take part in factional warfare. Hire galactic hit-men on your rivals. Raid neighbors for rare resources. Train spies to infiltrate enemy bases for key intel. Grow your empire to dominate the galaxy.

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64% of 1,825

Project Castaway is a survival crafting title set in the Pacific Ocean. Live the life of a stranded castaway, with only yourself - and the island's inhabitants - for company! Sail the ocean, hunt, explore unique islands and gather resources as you fight for survival.

If you loved these, you'll love this

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👥 Not stated
Reviews
100% of 11

“Hero Hospital” is a classic hospital management game: send in undercover agents and fake patient brokers, unleash dogs to cause crashes and chaos, dump trash and throw bombs, and even head into outbreak zones to fight viruses. The gameplay can be expanded endlessly.

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Released
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$ · Cheap
Players
👥 1–4 players
Reviews
100% of 1

Capture monsters and throw physics objects in shifting dungeons! Farm, feed, sacrifice, and sell them from your basement. 1-4 players horror dungeon crawling X creature collection & farming! R.E.P.O. meets Slime Rancher / Horror Pokémon!

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$ · Cheap
Players
👥 Up to 4 players
Reviews
85% of 113

Explore, loot, and rush back to defend your ship against alien hordes. Solo or 4-player coop, grow stronger run after run in this frantic action roguelite with a touch of tower defense.

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👥 Not stated
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87% of 1,036

Terraform a dead planet back to life in this open world survival crafting game. Explore ruins, gather resources, print machines, drive modular vehicles, grow forests, biomes, and ecosystems. Create life and make it thrive with your own hands.

If you loved these, you'll love this

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Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
88% of 76

Stellarcraft is a sci-fi tower defense adventure: explore alien planets, gather resources, build defenses, and fend off waves of enemies, solo or in 4-player co-op. 🚀

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87% of 299

Grenades are holy relics. Shotguns are spellcraft. In this top-down survival action-RPG, discover a fantasy realm invaded by modern world and destroy nearly everything. Scavenge artifacts, forge weapons, build outposts, brew potions, and hunt the corruption devouring the land. Play solo or co-op.

If you loved these, you'll love this