Choose Kerbal Space Program
Choose Kerbal Space Program if it carries the stronger Steam consensus at 95.9% positive across 77,731 reviews.
Kerbal Space Program vs Space Simulation Toolkit
Kerbal Space Program and Space Simulation Toolkit both land in Indie, Simulation on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Indie, Simulation on Steam. Kerbal Space Program (2015) is 5 years older than Space Simulation Toolkit (2020). Kerbal Space Program scores higher on Steam reviews (95.9% positive) than Space Simulation Toolkit (80.8% positive). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Space Simulation Toolkit
Choose Space Simulation Toolkit if you want a Free To Play and Early Access experience. On Steam, it's the newer release (2020) and ships with the modern feature baseline. Space Simulation Toolkit launched in 2020.
Both Kerbal Space Program and Space Simulation Toolkit sit in Indie and Simulation on Steam, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Kerbal Space Program |  Space Simulation Toolkit | |
|---|---|---|
| Released | 2015 | 2020 |
| Genres | Indie, Simulation | Indie, Simulation, Free To Play, Early Access |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Deck Unsupported |
| Price | 9.99 USD | 24.99 USD |
| Steam reviews | 95.9% positive (77,731 reviews) | 80.8% positive (391 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Squad | Pavel Kudinov |
Side by side
- Both share Indie, Simulation on Steam.
- Kerbal Space Program (2015) is 5 years older than Space Simulation Toolkit (2020).
- Kerbal Space Program scores higher on Steam reviews (95.9% positive) than Space Simulation Toolkit (80.8% positive).
- Kerbal Space Program is currently ~60% cheaper on Steam than Space Simulation Toolkit (9.99 USD vs. 24.99 USD).
- Steam Deck: Kerbal Space Program is Deck Playable, Space Simulation Toolkit is Deck Unsupported.
Kerbal Space Program vs Space Simulation Toolkit — FAQ
- Which is better, Kerbal Space Program or Space Simulation Toolkit?
- On Steam reviews Kerbal Space Program scores higher (95.9% positive) than Space Simulation Toolkit (80.8% positive). Both have enough reviews to trust the signal, so for players using reviews alone, Kerbal Space Program is the safer pick. Genre fit still matters — check the side-by-side table for the categories each game lands in.
- Should I play Kerbal Space Program or Space Simulation Toolkit first?
- If you want chronology, Kerbal Space Program (2015) came out before Space Simulation Toolkit (2020). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Kerbal Space Program and Space Simulation Toolkit similar?
- They overlap on Indie, Simulation on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.