Find the Steam hidden gems
A realistic Mars simulation that progresses from rover operation to a crewed landing, with single-player, co-op, and multiplayer, and a roughly 22-hour campaign.
A technical Mars-colony survival sandbox where you build bases, mine resources, and manage life support alone or in co-op — absorbing at times, but mixed reviews cite bugs and a rough tutorial.
2026-01-30
In this single-player physics sim, you construct and program vehicles, explore and customize 3D planets, and tackle career contracts — a deep sandbox that reviewers stick with for 19 to 90+ hours.
2023-01-26
