GAME VS GAME
Kerbal Space Program is more popular right now with 4,105 players on Steam, more players than X4: Foundations (3,732). It also leads over the last 30 days, with 2,671 players on average against 2,468 for X4: Foundations. The highest all-time peak belongs to Kerbal Space Program (23,482 players).
Concurrent players on Steam. Drag or pinch to zoom; the table below has every number.
| Stat |  Kerbal Space Program |  X4: Foundations |
|---|---|---|
| Players right now | 4,105 | 3,732 |
| 24-hour peak | 4,105 | 3,732 |
| All-time peak | 23,482Apr 19, 2026 | 15,216Dec 2, 2018 |
| 30-day average players | 2,671 | 2,468 |
| Steam reviews | 95.6% positive148k reviews | 80% positive30k reviews |
| Price now (US) | $39.99 | -80% $9.99 |
| Lowest price we have seen | $3.99 Dec 20, 2025 | $9.99 Nov 2, 2026 |
| Twitch viewers now | 4936 on average, 7 days | 1734 on average, 7 days |
| Release date | Mar 1, 2013 | Aug 1, 2017 |
Green marks the leader in each row (for prices, the cheaper game). Prices are US Steam prices.
Kerbal Space ProgramX4: FoundationsPick 2 to 4 games. Only games with a player count page can be compared.
Kerbal Space Program is more popular right now with 4,105 players on Steam, more players than X4: Foundations (3,732). It also leads over the last 30 days, with 2,671 players on average against 2,468 for X4: Foundations. The highest all-time peak belongs to Kerbal Space Program (23,482 players).
Kerbal Space Program peaked at 23,482 concurrent players on April 19, 2026. X4: Foundations peaked at 15,216 concurrent players on December 2, 2018.
Kerbal Space Program costs $39.99 on the US Steam store, and the lowest price we have seen is $3.99. X4: Foundations costs $9.99 on the US Steam store.
Player counts updated 2 minutes ago.
RageQuit Charts is not affiliated with Valve Corporation. Steam and the Steam logo are trademarks of Valve Corporation. Player counts come from the official Steam Web API.
