Kerbal Space Program
Short description
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- Developer
- Squad
- Publisher
- Private Division
- Release
- Mon, Apr 27, 2015
- Price
- $39.99
- Reviews
- 121,587
- Positive
- 96%
- Followers
- 303,758
- Owners (estimated)
- 2M – 5M
- Concurrent players
- 1,844
- Genres
- Indie, Simulation
- Features
- Steam Trading Cards, Steam Workshop, Partial Controller Support
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by $31.47, the average price these copies actually sold for — weighted from the price history rather than taken from the $39.99 launch price. That is 21% below list price on average. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for Kerbal Space Program to get cheaper? Name your price and we will email you when it gets there.
Media
History
30 data points since Oct 2, 2026. Gaps mean nothing changed — the value carries forward.
The revenue curve is an estimate, not a measurement. It is the only calculated series here: each interval takes the review growth of that period, multiplies it by the sales-per-review factor and by the price actually charged at the time, and adds the result to the running total. That is why it climbs more slowly through discount periods than the review curve next to it. The last point is the same figure quoted above — gross, before Steam's cut, VAT and refunds. How these numbers are calculated.
Lowest recorded price: $3.99 on Jun 26, 2025.
Similar games that found an audience
Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Kerbal Space Program. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.
| Image | Name | Studio | Shared | Tag difference | Price | Reviews | Positive | Released | Revenue (estimated) |
|---|---|---|---|---|---|---|---|---|---|
|
Universe Sandbox | Giant Army first game | 5 | − Space Sim + Destruction | $20.09 33% |
28,055 | 96% | Mon, Aug 24, 2015 | $34.6m $27.4m – $54.7m |
|
Kerbal Space Program 2 | Intercept Games first game | 4 | − Simulation − Space Sim + Exploration + Building | $49.99 | 27,993 | 26% | Fri, Feb 24, 2023 | $49.4m $27.7m – $49.4m |
|
X4: Foundations | Egosoft 8 titles | 4 | − Physics − Science + Economy + Flight | $49.99 | 25,463 | 79% | Fri, Nov 30, 2018 | $51m $44.5m – $89m |
|
Spaceflight Simulator | Team Curiosity ✦ 2 titles | 4 | − Physics − Science + 2D + Exploration | $14.99 | 9,551 | 97% | Thu, Feb 17, 2022 | $5.6m $2.6m – $6.5m |
|
X Rebirth | Egosoft 8 titles | 4 | − Physics − Science + Sci-fi + Action | $29.99 | 5,155 | 42% | Fri, Nov 15, 2013 | $6.7m $3m – $28.9m |
There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.