Approximately Up Player Count: Live Steam Numbers
What this number actually tells you
Concurrency is a bad way to judge a building sim and a good way to judge a live-service game, and Approximately Up is the first kind. Sessions here are long — an interplanetary flight was slow enough that the developer added a 3x Fast Forward in patch 1.0.100 specifically to shorten them — so a few hundred concurrent players represents a much larger group cycling through long sessions rather than a dwindling one.
The more useful health signal is 979 Steam reviews in 26 days at 94% positive, plus twelve patches in that same window. For a game built by one person over five years, those two numbers together say more than a concurrency snapshot does.
Why there is no peak history on this page
Steam's public API returns the current concurrent count and nothing else — no 24-hour peak, no all-time high, no daily series. Sites that show those charts either scrape them over time or buy the data. Rather than print an estimate dressed up as a measurement, this page shows the one figure that comes straight from the API, with the timestamp it was read at.
Player count read from the Steam API:
Deciding whether to buy? The Steam review breakdown covers what players praise and complain about, and the system requirements explain why large ships hit the CPU before the GPU.