
Outpost Zero
Outpost Zero blends the genres of Multiplayer Base Building Survival and Simulation games in a Sci-Fi universe.
Looking for that same cute and replayable spark as Daybots? These co-op games are worth a look next. Plenty here let you team up if you like.
A first-person colony sim in a voxel world where you recruit farmers, miners and guards, then hold the walls each night against the monster horde. Easy to run as co-op, with shared colonies, trading and long tech progress from slings to gunpowder.
Replayable
Cute robots, slow-growing towns, and a friend to build with. Team up for the co-op campaign or face off in PvP, laying roads, boat routes, and trains while your colony farms, researches, and climbs through three ages.
Cute, Replayable, Colorful
The Goal: Repopulate the entire Galaxy with Dinkys, keep them safe, and fully automate everything!
Cute, Colorful
Bish Bash Bots is a unique mix of casual tower defense strategy and all-out brawling action. Team up in couch co-op / online play or go it alone and fight to save the world by building upgradable turrets, unlocking gadgets and bashing bots with giant hammers.
Cute, Replayable, Colorful
Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends. You move stations, dock them together, run conveyors and pipes, keep astronauts fed and housed, and research your way toward home. Relaxed and open-ended, it suits co-op friends who want to build side by side.
Replayable
A colony building game with an emphasis on unexpected events, online co-op, and managing a unique community. Build your colony, feed your colonists, research technologies, craft advanced weapons, explore the world, fight enemies and defend your property.
Cute, Replayable, Colorful
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Defend Earth's remaining colonies using an arsenal of deadly weapons to torch, slice, throw, and impale swarms of alien invaders.
Replayable
A procedurally-generated, open-world, first-person colony sim. Build colonies in an infinite world, alone or with friends via Steam or self-hosted multiplayer.
Replayable
Outpost Zero blends the genres of Multiplayer Base Building Survival and Simulation games in a Sci-Fi universe. On a lawless alien world, robotic scouts are tasked with building an Outpost for human colonists. Command AI minions, colonize the planet, and survive the perils of Gaiya.
A sci-fi colony sim that starts with one lander and a rover and ends wherever your ambition does. Pick a faction, grow an outpost into an empire, trade on a player-run market, or share a region with friends. It runs on almost anything and never asks you to wait for a timer.
Replayable
Tower Defense meets Base Management. Strategically place your defenses. Craft wacky ammunition like fiery peppers and boomerang bananas. Discover amazing weapons and automate your economy while defending against waves of enemies. Can you handle the chaos?
Cute, Replayable, Colorful
Build turret lines and conveyor spaghetti with co-op friends, then hold your core against waves or send tanks at each other in team PvP. Mindustry mixes factory chains, tower defense, and small RTS assaults across two planet campaigns, with public servers, private sessions, and mods to keep the machines humming.
Replayable

Outpost Zero blends the genres of Multiplayer Base Building Survival and Simulation games in a Sci-Fi universe.

Build a space colony from a single rover, grow it into a sprawling economy, and rule it your way.

Explore an open world, sci-fi sandbox – in PVP, PVE, and co-op.

Co-op and Single player Tower Defense genre.

A cozy first-person colony game. Land on a planet you bought on credit (yours, mostly), chop, fish and farm with your own hands, then grow a town of…

You crash as a tool salesman on a hostile planet, then dig, craft and build your way to a rocket off it.

Ooglians are coming! Nothing excites an ooglian more than smashing machinery.

An incremental swarm tower defense. Play solo or 2–4 player Steam co-op.

Defenders of the Last Colony is a Top Down Shooter with Strategy gameplay mechanics, where you have to protect the Colony's core while you gather…

BOTS is a high intensity, lightning fast couch coop, solo dev, Indie game.

Fight against rebel robots together with your friends and save planets from invasion....

Defend humanity's last hope, pilot a powerful mech, in Frontlines Crisis!

When humanity fell, chickens took over, and you are one of them: a high-IQ bird defending an Energy Core, holding off zombie waves, and building a…

Play as space dogs, haul loot with a gravity beam and escape the swarm before it takes everything back.

Grab three co-op friends and run a space station like a factory with guns.

Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends.

Desynced is a sci-fi automation strategy game where drones do the hauling instead of belts.

Tower Defense meets Base Management. Strategically place your defenses. Craft wacky ammunition like fiery peppers and boomerang bananas.

TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends.

Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…

Run a bee hive with co-op friends and keep the queen alive. You build honeycomb bases, raise workers and warriors, research tech, and hold off waves…

FOUNDRY is a first-person factory builder on a procedurally generated voxel planet, where you and co-op friends mine resources, lay belts and pipes…

Pilot a dwarven mech and fly a dragon as you build and defend outposts across a shattered magical realm.

A colony building game with an emphasis on unexpected events, online co-op, and managing a unique community.

Farm an alien planet from inside a big, trusty mech, solo or with up to three co-op friends.

Play as space dogs, haul loot with a gravity beam and escape the swarm before it takes everything back.

When humanity fell, chickens took over, and you are one of them: a high-IQ bird defending an Energy Core, holding off zombie waves, and building a…

A tower defense roguelike about robots and ooze. Play solo or local multiplayer, protect the Glorp, and defeat the creeps.

Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends.

Grab three co-op friends and run a space station like a factory with guns.

Stellarcraft is a sci-fi tower defense adventure: explore alien planets, gather resources, build defenses, and fend off waves of enemies, solo or in…

Desynced is a sci-fi automation strategy game where drones do the hauling instead of belts.

Invasive Species is a couch co-op tower defense game where you and your friend plant towers in pots to protect your grandparents greenhouse from the…

TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends.

Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…

Tower Defense meets Base Management. Strategically place your defenses. Craft wacky ammunition like fiery peppers and boomerang bananas.