Steam reviews

Overwhelmingly Positive

95% of 139,322 reviews

Critic scores

Metacritic

Generally favorable

Aggregated from professional reviewers. OpenCritic and others are on the roadmap.

Where to play

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Simulation LiveActive

KERBAL SPACE PROGRAM

Kerbal Space Program has 4,226 concurrent players on Steam right now. Its 24 hour peak is 4,387 and its all-time peak is 12,983. Data refreshes every 5 minutes from the official Steam Web API.

DEV · SquadPUB · Private Division2015

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.

Solid daily community. Plenty of people to play with right now.
Currently at 33% of the all-time peak of 12,983 players.
Last updated 12 months ago: KSP x Youtooz plushies now available!.

Playing now

4,226

24h peak

4,387

24h change

▼ 0.3%

Quick verdict

Is Kerbal Space Program still alive in 2026?

See verdict →

PREVIOUS 24 HOURS

GALLERY & TRAILERS

1 / 15

ACROSS PLATFORMS

STEAMLIVE

Current

4.23K

24h peak

4.39K

All-time

13.0K

TWITCHLIVE · VIEWERS

Watching now

514

Xbox · PlayStation · Nintendo

No public concurrent-player API exists for these platforms. Other sites guess by scraping achievement timestamps or leaderboards. We won’t make up numbers. If the platforms ever ship a real API, real numbers will show up here.