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Squirrel's Pick Squirrel's PickThe best game on this page. If you only try one, try this.
Space SimEconomySpace
$49.99 ~167.4 hr median no co-op complexity: heavy 79.9% of 29k
The Squirrel's verdictX4 operates at galaxy scale: manage a living economy, build fleets, and run trade networks across dozens of sectors without a scripted endpoint. Where Space Haven keeps you focused on one crew's survival, X4 expands outward into fleet command and empire logistics. Median playtime sits at 167.4 hours, but reviewers consistently flag that tutorials explain mechanics without connecting them to actual play.
Not for you if you found Space Haven's interface already frustrating — X4 reviewers describe a steeper, more poorly-signposted learning curve.
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Closest Match Closest MatchThe most similar game to the anchor, by what players say.
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 verdictStardeus is built around automation puzzles — power routing, robot tasking, and a dense tech tree — that must be unlocked before basic ship functions work. Reviewers who enjoy optimizing layered systems rate it highly; those expecting to manage a crew from the start describe the early research wall as a grind that disrespects player time. Median playtime is 53.8 hours.
Not for you if you want life support and basic resources available without grinding through a long research queue first.
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Budget Pick Budget PickThe best game here for the least money.
Base-BuildingAutomationResource Management
$19.99 ~40.6 hr median co-op complexity: moderate 80.9% of 3k
The Squirrel's verdictBoth put you in first-person control of a space base you shape yourself, managing power and resource chains while automation slowly takes over the grind. Astro Colony trades Space Haven's crew-survival tension and ship combat for factory-style automation and asteroid-catching, with co-op support. Median playtime runs 40.6 hours, shorter and more focused than Space Haven's open-ended runs.
Not for you if you want survival stakes and crew management rather than automation-chain building, or you need deep endgame content beyond a defined progression tree.
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CyberpunkOpen WorldOpen World Survival Craft
Jank Tolerant Jank TolerantRough edges and bugs — rewarding if you don't mind them.
$19.99 ~59.2 hr median no co-op complexity: heavy 80.6% of 3k
The Squirrel's verdictBoth games have you managing a ship's interior room by room, balancing power, hull integrity, and crew survival while scavenging to keep a fragile vessel running. Ostranauts trades Space Haven's fleet-building and combat scope for a grittier, single-ship salvage loop centered on inventory management, with a steeper and less-explained learning curve than most games in this space.
Not for you if you want clear tutorials and polished systems rather than a barebones framework you have to puzzle out yourself.
5
SpaceSci-fiBase-Building
$19.99 ~29.2 hr median no co-op complexity: moderate 75.4% of 2k
The Squirrel's verdictThe Last Starship centers on designing and building ships cell by cell while keeping crew and resources in order under survival pressure. Reviewers describe less research depth and fewer systems than Space Haven, and note the 1.0 release arrived with limited endgame content. Priced at $19.99 with a median playtime of 29.2 hours, it offers a more streamlined version of the same core loop.
Not for you if you want endgame depth and system verticality — reviewers describe its systems as thin and performance-limited on larger ships.
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Space SimEconomySci-fi
$29.99 ~23.6 hr median no co-op complexity: moderate 74.7% of 2k
The Squirrel's verdictSpace Haven's ship-building carries over: assemble vessels from modular pieces with real physics constraints rather than free-form shapes. Starminer trades Space Haven's crew-survival management for flight, mining, and combat systems with Newtonian movement. Fits players who want the construction loop without the colony-logistics layer, and don't mind slower, physics-driven piloting.
Not for you if you came for crew management and base survival rather than flying and mining, or you want fast, arcade-style ship handling.
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The Spatials: Galactology
PCMacLinux
City BuilderColony SimBase-Building
$12.99 ~15.8 hr median no co-op complexity: moderate 68.9% of 257
The Squirrel's verdictCrew assignment, automated resource production, and base expansion under pressure map closely to Space Haven's loop. Galactology swaps ship-hull construction for a fixed station and layers in tourism-sim elements. Median playtime is 15.8 hours; reviewers note content runs thin after the opening stretch, and the mouse-only control scheme with no keyboard shortcuts draws repeated criticism.
Not for you if you came for ship-building and crew progression — reviewers say both systems are thin or absent here.
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Interstellaria
PCMacLinux
SpaceExplorationDiplomacy
$9.99 ~9.1 hr median no co-op complexity: moderate 55.9% of 410
The Squirrel's verdictA plot-guided campaign with FTL-style combat and planet exploration, Interstellaria gives you a crew to station-manage and a story arc to follow rather than a freeform ship-building sandbox. At a median of 9.1 hours, the scope is far narrower than Space Haven's open-ended runs. Reviewers cite bugs, UX friction, and disappointment relative to expectations, with a Mixed Steam rating.
Not for you if you want ship construction, deep crew systems, or an open sandbox rather than a scripted campaign.