Top similar games like Null Keeper:

Maia is a colony building game set in the not-so-distant future. Your colonists make planetfall on a hostile world and you must ensure their survival and their safety, constructing their off-world habitat from almost nothing and sheltering them from a dangerous, often deadly environment.

Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.

IXION is an unrelenting, city-building odyssey across the stars. As Administrator of the Tiqqun, DOLOS’ prototype space station, you are tasked with balancing preservation and exploration as you manage infrastructure, resources and crew. Can you keep the flame of humanity alight in the cold dark?

Guide a group of space settlers trying to establish a base on a remote planet. Grow food, collect energy, mine resources, survive disasters and build a self-sufficient colony in a harsh and unforgiving environment.

Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world.

Build. Defend. Survive. Expand. A sci-fi base-building game on a hostile alien world. Gather resources, build a sprawling high-tech colony, and defend against relentless alien threats—then unlock new planets, new challenges, and the secrets of humanity’s last frontier.

Endzone is a post-apocalyptic survival city builder, where you start a new civilization with a group of people after an ecological disaster. Build them a new home and ensure their survival in a shattered world, threatened by constant radiation, toxic rain, sandstorms and droughts.

A prologue to a survival strategy game on the Moon. Contact with Earth is lost, help isn’t coming, and the Sun burns everything in its path. Control your mobile base, gather resources, make tough moral choices—and run into the shadows.

Design, build and control your own space station. Mission command and control is in your hands and only careful planning and vigilant supervision will keep your crew and space station safe.

Dark Moon is a survival strategy game where in order to survive you must avoid the Sun’s scorching rays and embrace the darkness. Gather resources, upgrade your mobile base, make tough moral decisions, but most importantly - don’t go into the light!

Hostile Mars is a factory-building game focused on combat! Explore an open world and discover new tech to unlock powerful weapons and structures. Create efficient supply chains using delivery bots. Salvage destroyed enemies for resources. Design your base to withstand increasing waves of enemies!

Design your dream space station in Space Architect! Master the power of automation or 'hire' an army of crewmates to handle your ever-growing production. Mine asteroids, fabricate goods, and engage in interstellar trade to pay off the menacing Big Evil Corp. Will you thrive in the vastness of space?

A space colony survival sim. Build a station room by room, lay the wires, pipes and ducts that carry power, water and air, and keep a crew fed, rested and sane. Build it how you like and keep it running.

Frostpunk is the first society survival game. As the ruler of the last city on Earth, it is your duty to manage both its citizens and infrastructure. What decisions will you make to ensure your society's survival? What will you do when pushed to breaking point? Who will you become in the process?

Dive into a hardcore space station simulation and overcome the unforgiving environment of space. You must build and manage your station under the pressures of life, economics, and thermodynamics. Rise to power through economic leverage or ruthless military might. 

It's the year 5781 -- and you have been chosen to build and lead a space station in a wild corner of the galaxy! Attract visitors and explore hundreds of planets to fund your station.

Build and expand your very own settlements in high mountains! Carefully plan production chains and satisfy various needs of your three-caste society while dealing with mountain hazards such as weather breakdowns and avalanches. Are you skilled enough to make your town thrive?

This is a free version of Oxygen, featuring the first 50 game-days. Build your city around the Oxygen Center and ensure your people's survival in a post-apocalyptic future, threatened by crack explosions, deadly winds, droughts and frosts. Lead your people and keep the Oxygen Center running!

Embark on a space voyage with your ragtag crew of civilians in search of a new home. Build spaceships tile by tile, create optimal gas conditions, manage the needs and moods of their crew, encounter other space-faring groups, and explore the universe in this spaceship colony simulation.

Mine, build, upgrade, and extract. Scavenge planets in a base-building resource management sim. Gather materials, construct facilities, and order units to survive in a hostile galaxy. Launch your base to the next zone before planetary threats overwhelm you.

Build a fortress and try to help your dwarves survive against a deeply generated world. Keep your dwarves happy, grow their community and beware of digging too deeply. The deepest, most intricate simulation of a world that's ever been created.

Build, trade, and survive in a living ecosystem where every choice shapes the colony and every faction remembers. Deep systems connect production, management, and survival in a world that never stops reacting.

Endzone 2 is a post-apocalyptic survival colony builder, where you embark to secure humanity's survival after a cataclysmic disaster. Discover and repopulate the last habitable grounds, while the survival of your people hinges on your wits, foresight, and resilience in a harsh and unforgiving world.

There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.

A fantasy village builder focusing on creative building, colonist psychology and base defense. Handle resources, farming, production, tools, diplomacy, families, trading, defense, and research, as well as the wishes, expectations, thoughts, and equipment of every villager.

As the AI responsible for a Generation Ship, you are humanity's last hope. Build efficient raw material cycles and help your crew in a realistic real-time simulation to survive the challenges of space on their long journey to a new home!

Cast into an idyllic wilderness, will you endure? A sandbox city-building game featuring a deceptively cheerful world: build freely —no grids— plus a fully simulated economy, intricate production chains, deep research tree, and growth you can feel. Can your people survive the winter?

A full reimagining of Frostpunk, the groundbreaking survival city builder, packed with new content. In a world ravaged by endless frost, become the Captain of the last city on Earth. Manage its people and infrastructure while facing cruel weather and even crueler choices.

Build and lead a colony on the surface of an endless Wall. Manage resources and your people, develop new technologies, defend against relentless zyrex attacks, and send robo-spiders on risky expeditions. Keep the colony from collapsing – in Wall World, it's easy to fall.

Build, scavenge, craft, and perform occult rituals to survive in a demon-infested, post-apocalyptic colony simulation. Will you survive Judgment day?

Explore alien planets with carefully designed ecosystems, weather, resources, dangers and unique phenomena. Hunt animals for food and collect resources to craft equipment and repair devices on your ship. Escape each unique planet and unlock crew members and new ships.

After a nuclear war life on the surface became impossible. A 300m thick radioactive fog covered the Earth. We are looking for bold active people to manage the process of restoring life on Earth. Join!

In this city-building strategy game, you control a group of exiled travelers who decide to restart their lives in a new land. They have only the clothes on their backs and a cart filled with supplies from their homeland. The townspeople of Banished are your primary resource.

Are you a master of the magical arts? Prove it in this cozy colony-sim wizard tower defense game. Curl up and build your base, keep your mages happy, craft recipes, research new magic spells, and defend your wizard's keep. Will your Artificer's Tower be the envy of all your magical friends?

Gnomoria is a sandbox village management game where you help lead a small group of gnomes, who have set out on their own, to thrive into a bustling kingdom! Anything you see can be broken down and rebuilt elsewhere.