Single-player games like Oasis Mission: Colony Sim
Below are 11 single-player Steam games similar to Oasis Mission: Colony Sim, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Oasis Mission: Colony Sim page.
Ranked picks
- 1
Rail Route
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
In Rail Route, you will design, construct, upgrade, and automate your railway network in one of the many maps based on real-life cities worldwide. Dispatch the trains to make the traffic flow and the network grow!
- 2
The Crust
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy with Oasis Mission: Colony Sim.
Automate a lunar base as you become the savior of humanity exploring the future on the moon. Mine, craft, research, and trade resources with Earth in this gripping narrative basebuilder.
- 3
Laysara: Summit Kingdom
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
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?
- 4
Stronghold Crusader HD (2012)
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy with Oasis Mission: Colony Sim.
The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.
- 5
Stronghold: Warlords
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy with Oasis Mission: Colony Sim.
Besiege Great Khans, Imperial warlords and Shōgun commanders in Stronghold: Warlords, the latest 'castle sim' from Firefly Studios. Command AI warlords across the battlefield as you build a castle economy and new gunpowder-fuelled siege engines!
- 6
Per Aspera
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
Make Mars your own! Take control of the world’s most sophisticated AI (AMI) and terraform the surface of the Red Planet for a city-building experience on a planetary scale. Transform this barren world into a lush paradise and explore the surface for any ancient secrets that may be waiting.
- 7
Flooded
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy with Oasis Mission: Colony Sim.
Flooded is a reversed city-builder, in which you need to optimize your production on an island that shrinks over time. Gather enough resources to flee to safety, while the surrounding world is getting flooded.
- 8
Space Architect
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
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?
- 9
Solargene
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
Take Command of a Space Corporation in the Sci-Fi Simulator Solargene! Manage personnel, design and develop colonies and orbital stations across the solar system! Mine resources, establish logistics, research cutting-edge technologies, trade, and complete missions
- 10
Factorio
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.
- 11
Farlanders
Single-player alternative to Oasis Mission: Colony Sim — playable solo, no multiplayer required. Shares Strategy and Indie with Oasis Mission: Colony Sim.
Terraform, strategize, and construct a Martian colony in this retro-inspired turn-based city builder. Create a comfortable living for your citizens, research alien artifacts, and uncover the secrets of the Red Planet.