Single-player games like Hostile Mars
Below are 8 single-player Steam games similar to Hostile Mars, 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 Hostile Mars page.
Ranked picks
- 1
Moose Builders
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Strategy and Adventure with Hostile Mars.
Dig sand with a shovel and process into iron, silicon and more. Craft and merge better tools and machines to build solar panels to power them. Research new machines to automate everything in multi-story factories. Play alone or with friends to survive in the desert and turn it into a solar farm.
- 2
Railborn
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Adventure with Hostile Mars.
Railborn is a survival game where you build your train piece by piece. Navigate a world entangled by branching tracks. Find rare plants to cultivate on your farms. Upgrade your train - manage its power systems, direct resource flow, and distribute water. Designed for 1 to 4 players.
- 3
Galaxy Scavengers
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Strategy and Adventure with Hostile Mars.
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.
- 4
Settletopia
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Strategy with Hostile Mars.
Grow a small colony into a vast, world-spanning civilization. Play solo or with friends as you gather resources, build cities, manage colonist needs, explore uncharted lands, establish logistics, raise armies, forge alliances, and wage wars—all in a living world.
- 5
Ecliptica
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Action and Strategy with Hostile Mars.
Ecliptica is a first-person open-world colony survival simulator with a fully dynamic economy. Set on a hostile alien planet, you'll found corporations, fight for resources, and build a sustainable future—or be wiped out by ruthless nature, politics, and competition.
- 6
Beyond These Stars
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Strategy with Hostile Mars.
Build a city on the back of a Space Whale and learn to coexist as you journey through the stars. Manage intricate supply chains and the needs of your people as you build outposts, meet aliens, and uncover the mysteries of the universe.
- 7
Terra Taker
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Adventure with Hostile Mars.
Terra Taker is an open-world survival crafting game where you build megastructures to terraform a fantasy planet. Gather resources, build automated bases, and transform floating islands, tornadoes, snowfields, lava zones, and lightning-scorched lands into a new paradise for humanity.
- 8
Autonomica
Single-player alternative to Hostile Mars — playable solo, no multiplayer required. Shares Strategy and Adventure with Hostile Mars.
A survival automation game set in an alternate 1980s. Build supply chains where farming fuels chemistry and mining drives manufacturing. Rebuild a world fractured by failed time experiments - solo or co-op. Launch time-jump extractions into unstable futures for tech that shouldn't exist yet.