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Squirrel's Pick Squirrel's PickThe best game on this page. If you only try one, try this. Budget Pick Budget PickThe best game here for the least money.
Base-BuildingRTSExploration
$9.99 ~27.2 hr median no co-op complexity: moderate 84.3% of 830
The Squirrel's verdictReshaping Mars keeps the Mars colony-building core: surveying terrain, mining resources, expanding a base building by building. Unlike Planetbase, colonist death spirals from broken AI aren't the complaint here — instead reviews cite a repetitive build-hire-balance loop and an unautomated hiring system. Priced at $9.99, Very Positive rated, median 27 hours played.
Not for you if you need varied content past the early hours — reviews describe the loop as repetitive, grind-heavy, and thin on guided goals or story.
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Closest Match Closest MatchThe most similar game to the anchor, by what players say.
Real-TimeAutomationBase-Building
Strong Mods Strong ModsA deep, active modding scene extends it past its base content.
$29.99 ~30.8 hr median co-op complexity: moderate 75.9% of 6k
The Squirrel's verdictPer Aspera puts you in control of an AI overseer terraforming Mars rather than directing individual colonists, so task-priority failures at the pawn level aren't the challenge here — planetary-scale logistics chains are. A scripted AI-consciousness story runs alongside the building. Reviews call it more factory game than colony sim, with limited direct control over individual units.
Not for you if you want hands-on colonist management and tension rather than macro logistics and a visual-novel-style narrative.
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Colony SimBase-BuildingCity Builder
$21.99 ~28 hr median no co-op complexity: moderate 80.2% of 2k
The Squirrel's verdictFounders' Fortune tracks colonist mood and personality traits, giving settlers more individual character than most genre entries. The building and upgrade system draws consistent praise for clarity. Reviewers still flag dumb task prioritization and micromanagement that never eases as the colony grows — the personality layer adds depth without fixing the underlying logistics behavior.
Not for you if you want colonist AI that handles task priorities sensibly without constant player intervention as the colony scales up.
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Colony SimCity BuilderSci-fi
$24.99 ~18.9 hr median no co-op complexity: moderate 81.7% of 961
The Squirrel's verdictBoth put you managing off-world colonies with resource chains and building placement. Imagine Earth has a pause button and a real-time-with-planning pace instead of Planetbase's unpaused colonist AI, but swaps individual survival management for planet-scale strategy: pollution, disasters, and competing corporations racing to strip resources first.
Not for you if you want colony management with named individuals to babysit rather than planet-wide resource extraction and competitor races.
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City BuilderEconomyHex Grid
$19.99 ~16.5 hr median no co-op complexity: moderate 78% of 2k
The Squirrel's verdictSuited to players who want colony-style building without constant crisis management — Before We Leave is pausable, colonists don't neglect survival needs to build, and the tone stays calm throughout. The build-out spans multiple islands and eventually multiple planets. Median playtime is around 16 hours, and reviewers note maps feel small and late-game completion rates are very low.
Not for you if you want the life-or-death pressure of unpaused colonist management, or you expect expansive maps and a satisfying endgame.
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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 shares Planetbase's core loop: alien-planet base building, digging rooms, gathering resources, researching upgrades, and managing colonists and robot helpers through survival threats. Where Planetbase's colonists ignore their own survival needs, Mercury Fallen's reviews report no such AI failures. Its complaint is different: content thins out after the early game, leaving research and mining with no real endgame objective.
Not for you if you want a long, escalating late-game rather than a strong opening that reviewers say goes flat after the early research and farming loop is unlocked.
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City BuilderPost-apocalypticSurvival
$29.99 ~36.4 hr median no co-op complexity: light 70.8% of 5k
The Squirrel's verdictPlayers who want a post-apocalyptic colony sim with more content runway than Planetbase will find Surviving the Aftermath has 36 hours of median playtime and adds scavenging expeditions plus story-driven events on top of the standard assign-colonists, manage-resources loop. Core logistics still frustrate reviewers, and some content is locked behind paid DLC that players flag as overpriced.
Not for you if the core logistics feel broken to you, or paywalled DLC content is a dealbreaker.
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Stellar Settlers: Space Base Builder
PCMacLinux
City BuilderColony SimBase-Building
$11.99 ~2.9 hr median no co-op complexity: light 70.4% of 830
The Squirrel's verdictStellar Settlers suits players who want a short, puzzle-like take on extraterrestrial base-building — reviewers describe unlocking the endgame in under 30 minutes of focused play. Pause is available. Median playtime sits at under 3 hours. Active bugs include unsaved raw materials and stalled delivery trucks, and the simulation depth is shallow by genre standards.
Not for you if you want deep, long-running simulation rather than a brief puzzle-style builder, or save bugs and delivery glitches are dealbreakers.