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Squirrel's Pick Squirrel's PickThe best game on this page. If you only try one, try this.
AutomationSpaceBase-Building
$19.99 ~142.3 hr median no co-op complexity: heavy 97.5% of 91k
The Squirrel's verdictDyson Sphere Program covers the same ground — mine, smelt, and route belts into factory chains — but does it across multiple planets with a median playtime of 142 hours. Its tech tree and building tools scale more evenly through mid and late game than Astro Colony's uneven progression. There is no co-op, so this is a solo experience for players who want the same core loop with significantly more depth and content.
Not for you if you were planning to play with a partner, since Dyson Sphere Program has no co-op mode.
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Base-BuildingSpaceColony Sim
$24.99 ~47.1 hr median no co-op complexity: moderate 85.8% of 11k
The Squirrel's verdictSpace Haven shares the tile-by-tile construction and interlocking system-building of Astro Colony but adds crew management, life support juggling, and ship-to-ship combat across a persistent voyage. Median playtime runs 47 hours. It's built for players who want colony automation wrapped in survival stakes and combat, not a relaxed factory puzzle.
Not for you if you wanted the co-op factory-building specifically, or dread another game with a rough, clunky tutorial and UI.
3
Budget Pick Budget PickThe best game here for the least money.
Base BuildingOpen World Survival CraftSurvival
$15.99 ~51.4 hr median co-op complexity: moderate 80.9% of 13k
The Squirrel's verdictStarRupture layers combat and exploration on top of a co-op factory loop — resource extraction, smelting, and belt-based logistics gated by tech progression. It shares co-op support with Astro Colony. The defining difference is combat, but reviewers flag that the rail logistics system generates unavoidable routing tangles and that deleting foundations forces a rebuild of surrounding belts, making layout changes costly.
Not for you if you want stable, edit-friendly building tools, or the rail logistics system's forced rebuilds on edits would frustrate you.
4
ExplorationColony SimBase-Building
Strong Mods Strong ModsA deep, active modding scene extends it past its base content.
$29.99 ~53.8 hr median no co-op complexity: heavy 87% of 2k
The Squirrel's verdictBoth are automation games built around resource chains, tech trees, and colonist/crew management on a base you expand tile by tile. Stardeus swaps Astro Colony's asteroid-and-factory loop for a ship you manage RimWorld-style, with fire and life-support systems adding survival pressure the anchor doesn't have. No co-op here, unlike Astro Colony's multiplayer.
Not for you if you wanted the co-op play Astro Colony offered, or you're wary of a slow, research-gated early game before basics like life support come online.
5
Closest Match Closest MatchThe most similar game to the anchor, by what players say.
AutomationBase-BuildingSpace
$18.99 ~40.1 hr median co-op complexity: moderate 85.1% of 808
The Squirrel's verdictOutworld Station shares Astro Colony's core loop: connect extractors to smelters to factories to warehouses, build a co-op base, and unlock new buildings through a tech tree. The difference is structure. Progression here is mission-by-mission and on-rails, gating advancement behind ship-building and fixed objectives rather than open automation. Median playtime sits at 40.1 hours, rated Very Positive.
Not for you if you want open-ended optimization rather than objective-by-objective progression with fixed maps and resource points.
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Base-BuildingSpaceColony Sim
$29.99 ~36.1 hr median no co-op complexity: moderate 76.7% of 4k
The Squirrel's verdictSame core loop: automated resource chains, belts, drones, and colonists building out an underground base with tech progression toward story milestones. The Crust drops multiplayer entirely and adds priority-based drone logistics that reviewers say frequently misfire, causing colonist deaths and resource shortages. Story pacing has the same uneven jumps between quiet stretches and sudden timed quests.
Not for you if you want co-op, since The Crust is single-player only, or you can't tolerate drone/priority bugs reviewers describe as causing colonist deaths and stuck production.
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Sci-fiSurvivalColony Sim
$9.99 ~37.2 hr median no co-op complexity: moderate 78.5% of 316
The Squirrel's verdictMercury Fallen puts players underground on an alien planet, digging out rooms, researching a tech tree, and wiring up production chains to keep a base running — the same core activities as Astro Colony. It has no co-op. At $9.99 with a 37-hour median playtime, it suits solo players who want research-gated base automation, though reviews warn of thin late-game content and a developer who has moved on to another project.
Not for you if you want a partner to play with, or late-game balance issues and stalled development concern you.
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AutomationSpaceBase-Building
$19.99 ~34.6 hr median no co-op complexity: heavy 76.9% of 458
The Squirrel's verdictFinal Upgrade is a logistics-puzzle game where the goal is expanding a supply chain from extraction to finished output through a gated tech tree — closer to a directed puzzle than open factory sprawl. It has no co-op and a 34.6-hour median playtime. Reviewers flag a confusing UI and unclear tutorial, but praise the sense of purpose that comes from defined objectives rather than purely open-ended building.
Not for you if you want co-op play, or a clear tutorial and polished UI from the start.