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Players manage a space program by designing and launching spacecraft in this physics-based simulation. Since its 2015 release, the title has accumulated 78,090 reviews on Steam. The game maintains a 95% positive rating, indicating a high level of user satisfaction within the indie market.
Overview
Kerbal Space Program is a 2015 Indie game developed by Squad and published by Private Division. On Steam it has gathered 116,084 player reviews, 95% of them positive, which counts as a overwhelmingly positive reception among indie titles in the Indie category. The game is available on linux, mac, windows, and launched at $40. The pairing of developer Squad with publisher Private Division is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Indie projects reach the market. indielist's white-box model estimates its lifetime sales at roughly 7.3 million to 17.1 million units, with the full Boxleiter factor breakdown shown on this page rather than a single black-box figure. Within indielist's catalog of indie games mapped to their studios, publishers, and funding, Kerbal Space Program can be compared against similar Indie titles and benchmarked on review counts and estimated sales.
Reviews
116,084
Positive
95%
Steam appid
220200
Engine
n/a
Sales estimate
vv1.07.3M to 17.1M
units (median: 12.2M)
≈ $167.1M to $389.8M net revenue (Steam cut + refunds + regional discount applied)
indielist estimates lifetime unit sales for Kerbal Space Program at roughly 7.3 million to 17.1 million copies, with a median around 12.2 million, derived from its 116,084 Steam reviews using a multi-factor Boxleiter model (version v1.0). That median maps to approximately $278.4M in net revenue after Steam's 30% cut, regional pricing, and refunds. Unlike black-box trackers, the full calculation is shown on this page: a base review-to-sales multiplier is adjusted for release year, launch price, review sentiment, studio size, and genre, and every adjustment is listed so developers, publishers, and investors can audit exactly how the figure was reached. The range itself reflects genuine uncertainty — review-to-sales ratios vary widely between games — so indielist publishes a low, median, and high band rather than a false-precision single number, and treats free-to-play, heavily discounted, and bundle-distributed titles as having wider error margins still.
Price history
90d · low $21.63Over the last 90 days the price ranged from $21.63 to $39.99, averaging $37.57 across 2 discount windows, with a historical low of $21.63 on 2026-03-27.
Synthetic series for demo. Real ITAD price history loads after Day 3 ingest.
Where to buy
Affiliate disclosure- Humble Store -76%$9.50 Buy
- Fanatical -72%$11.84 Buy
- Steam reference$39.99 Buy
- Green Man Gaming$39.99 Buy
- GOG.com$39.99 Buy
Live prices from public feeds, cheapest first. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.
Platforms
linuxmacwindows
Tags
SpaceSimulationSandboxPhysicsScienceSpace SimBuildingModdableIndieEducationOpen WorldSingleplayerExplorationFunnySci-fiDifficultAdventureReplay ValueStrategyComedy
Frequently asked questions
- How many copies has Kerbal Space Program sold?
- indielist estimates Kerbal Space Program has sold between 7,313,292 and 17,064,348 units (median 12,188,820), derived from its 116,084 Steam reviews with the white-box Boxleiter vv1.0 method. The full breakdown is shown on the page.
- Who developed Kerbal Space Program?
- Kerbal Space Program was developed by Squad and published by Private Division.
- When was Kerbal Space Program released?
- Kerbal Space Program was released in 2015.
- How many reviews does Kerbal Space Program have on Steam?
- Kerbal Space Program has 116,084 Steam reviews, of which 95% are positive.
Frequently asked questions
- How many copies has Kerbal Space Program sold?
- indielist estimates Kerbal Space Program has sold between 7,313,292 and 17,064,348 units (median 12,188,820), derived from its 116,084 Steam reviews with the white-box Boxleiter vv1.0 method. The full breakdown is shown on the page.
- Who developed Kerbal Space Program?
- Kerbal Space Program was developed by Squad and published by Private Division.
- When was Kerbal Space Program released?
- Kerbal Space Program was released in 2015.
- How many reviews does Kerbal Space Program have on Steam?
- Kerbal Space Program has 116,084 Steam reviews, of which 95% are positive.
Ecosystem
indielist positions Kerbal Space Program within the Indie segment so players can surface comparable titles by shared tags and genre rather than by storefront promotion. On the developer side, Squad's other releases and Private Division's wider catalog are one click away, letting developers benchmark where Kerbal Space Program sits among a studio's body of work and how its publisher's portfolio performs. Because indielist maps studios, publishers, games, and funding into one connected graph, the same Kerbal Space Program page serves three audiences at once: players hunting their next Indie game, developers studying how comparable projects were positioned and what they sold, and investors tracing which teams and labels are active in the space. A machine-readable markdown mirror of this page is published at the same path with a .md suffix for AI assistants, and its review, price, and sales-estimate figures are refreshed on a schedule rather than frozen at launch.
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