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Moonbase Alpha header image
Released Jul 6, 2010 Free Very Positive Counts toward your Steam games

Moonbase Alpha

By Virtual Heroes · published by NASA

SpaceSimulationFree to PlayMultiplayerOnline Co-OpFunnyMemesStrategyAdventureOpen WorldWalking SimulatorCo-op
Track this game Steam page
Followers —
Reviews 12,869 Very Positive
Players yesterday 3 at the busiest moment
Owners 1M–2M estimated

About Moonbase Alpha

Moonbase Alpha is a game tagged Space, Simulation and Free to Play by Virtual Heroes, released Jul 6, 2010. It has 12,869 Steam reviews (Very Positive). It has an estimated 1M–2M owners on Steam. The Steam games most like it include Project Eagle: A 3D Interactive Mars Base, BREATHE and The Backrooms Deluxe 2.

NASA has once again landed on the lunar surface with the goal of colonization, research, and further exploration. Shortly after the return to the Moon, NASA has established a small outpost on the south pole of the moon called Moonbase Alpha.
From the Steam page

Steam's store box shows the price and a buy button. It loads from Steam, which may set its own cookies.

Steam data

Everything Steam lists for Moonbase Alpha · record updated 1 day ago

Steam store

Overview

App ID39000
Release dateJul 6, 2010
Last change number40065466
Last record update1 day ago

App info

App type
Game
Developer
Virtual Heroes, Army Game Studio
Publisher
NASA
Steam profile
Counts toward game count and achievement totals · checked Nov 1, 2025
Website
nasa.gov/moonbasealpha

Platforms

Steam Deck
Playable

Features

5
Single-playerMulti-playerCo-opSteam LeaderboardsStats

Patches

Builds

1
BuildBranchUpdated
8352publicOct 25, 2026

Depots

Depots

1
IDNameSystemsSizeDownloadManifest
39001 — All 1.11 GB — 720444331315189964

Branches

1
BranchBuildUpdatedAccess
public 8352 — Open

Configuration

Install foldersteamapps/common/Moon Base Alpha

Launch options

1
ExecutableArgumentsSystemsDescription
Binaries\Win32\MoonBaseAlphaGame.exe All

Data from public Steam pages, updated daily; 1 day of history. Owner counts are estimates. LaunchRivals is not affiliated with Valve or Steam.

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