STEAMDB NEXUS

Steam app 39000 · updated 13 Sep 2026, 04:25 UTC

Moonbase Alpha

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.

Moonbase Alpha Steam header artwork
Virtual Heroes, Army Game StudioNASA
3playing now
924-hour peak
303all-time peak
2average, last 30 days

The last 30 days

+0.5Gain+23.19%% gain19Peak

260 hourly samples, with the daily peak drawn over them. Weekends are shaded.

0510152114 Aug19 Aug24 Aug29 Aug03 Sep08 Sep13 SepFriday 14 August 20263 peakSaturday 15 August 20266 peakSunday 16 August 20264 peakMonday 17 August 20263 peakTuesday 18 August 20264 peakWednesday 19 August 20264 peakThursday 20 August 20263 peakFriday 21 August 20263 peakSaturday 22 August 20267 peakSunday 23 August 20266 peakMonday 24 August 20265 peakTuesday 25 August 20264 peakWednesday 26 August 20262 peakThursday 27 August 20264 peakFriday 28 August 20264 peakSaturday 29 August 20264 peakSunday 30 August 20266 peakMonday 31 August 20265 peakTuesday 01 September 20263 peakWednesday 02 September 20263 peakThursday 03 September 20263 peakFriday 04 September 20262 peakSaturday 05 September 20263 peakSunday 06 September 20263 peakMonday 07 September 20264 peakTuesday 08 September 202613 peakWednesday 09 September 202619 peakThursday 10 September 20267 peakFriday 11 September 20269 peakSaturday 12 September 20269 peakSunday 13 September 20264 peak
Daily peakEvery hourly sample

All time

171 months, July 2012 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.

0821642453272012201420172019202120242026July 201275 monthly peakAugust 2012303 monthly peakSeptember 2012117 monthly peakOctober 201292 monthly peakNovember 2012109 monthly peakDecember 201264 monthly peakJanuary 201378 monthly peakFebruary 2013160 monthly peakMarch 2013208 monthly peakApril 201382 monthly peakMay 201378 monthly peakJune 201397 monthly peakJuly 201399 monthly peakAugust 2013113 monthly peakSeptember 201387 monthly peakOctober 201396 monthly peakNovember 201389 monthly peakDecember 201367 monthly peakJanuary 2014102 monthly peakFebruary 201492 monthly peakMarch 201474 monthly peakApril 201461 monthly peakMay 201464 monthly peakJune 201475 monthly peakJuly 201456 monthly peakAugust 201454 monthly peakSeptember 201447 monthly peakOctober 201445 monthly peakNovember 2014250 monthly peakDecember 201497 monthly peakJanuary 201588 monthly peakFebruary 2015139 monthly peakMarch 2015225 monthly peakApril 2015120 monthly peakMay 2015265 monthly peakJune 2015131 monthly peakJuly 2015125 monthly peakAugust 201595 monthly peakSeptember 201581 monthly peakOctober 2015111 monthly peakNovember 201581 monthly peakDecember 201589 monthly peakJanuary 2016155 monthly peakFebruary 201699 monthly peakMarch 201695 monthly peakApril 201672 monthly peakMay 201667 monthly peakJune 201671 monthly peakJuly 201664 monthly peakAugust 201668 monthly peakSeptember 201674 monthly peakOctober 201665 monthly peakNovember 201666 monthly peakDecember 201676 monthly peakJanuary 201776 monthly peakFebruary 201784 monthly peakMarch 201788 monthly peakApril 2017152 monthly peakMay 201799 monthly peakJune 201776 monthly peakJuly 201759 monthly peakAugust 201755 monthly peakSeptember 201751 monthly peakOctober 201763 monthly peakNovember 201757 monthly peakDecember 201757 monthly peakJanuary 201859 monthly peakFebruary 201889 monthly peakMarch 201849 monthly peakApril 201842 monthly peakMay 201856 monthly peakJune 201876 monthly peakJuly 201850 monthly peakAugust 201838 monthly peakSeptember 201840 monthly peakOctober 201826 monthly peakNovember 201882 monthly peakDecember 201825 monthly peakJanuary 201927 monthly peakFebruary 201931 monthly peakMarch 201931 monthly peakApril 201920 monthly peakMay 201926 monthly peakJune 201922 monthly peakJuly 201926 monthly peakAugust 201923 monthly peakSeptember 201918 monthly peakOctober 201924 monthly peakNovember 201935 monthly peakDecember 201923 monthly peakJanuary 202022 monthly peakFebruary 202029 monthly peakMarch 202028 monthly peakApril 202029 monthly peakMay 202030 monthly peakJune 202021 monthly peakJuly 202020 monthly peakAugust 202020 monthly peakSeptember 202035 monthly peakOctober 202060 monthly peakNovember 202039 monthly peakDecember 202028 monthly peakJanuary 202126 monthly peakFebruary 202129 monthly peakMarch 202122 monthly peakApril 202131 monthly peakMay 202136 monthly peakJune 202124 monthly peakJuly 202120 monthly peakAugust 202120 monthly peakSeptember 202120 monthly peakOctober 202119 monthly peakNovember 202132 monthly peakDecember 202138 monthly peakJanuary 202222 monthly peakFebruary 202217 monthly peakMarch 202214 monthly peakApril 202217 monthly peakMay 202216 monthly peakJune 202238 monthly peakJuly 202225 monthly peakAugust 202218 monthly peakSeptember 202217 monthly peakOctober 202215 monthly peakNovember 202215 monthly peakDecember 202216 monthly peakJanuary 202315 monthly peakFebruary 202328 monthly peakMarch 202314 monthly peakApril 202317 monthly peakMay 202312 monthly peakJune 202312 monthly peakJuly 202317 monthly peakAugust 202311 monthly peakSeptember 202314 monthly peakOctober 20238 monthly peakNovember 202311 monthly peakDecember 202312 monthly peakJanuary 202411 monthly peakFebruary 202418 monthly peakMarch 202415 monthly peakApril 20247 monthly peakMay 202412 monthly peakJune 20246 monthly peakJuly 20248 monthly peakAugust 202414 monthly peakSeptember 202410 monthly peakOctober 20248 monthly peakNovember 20249 monthly peakDecember 20247 monthly peakJanuary 202510 monthly peakFebruary 20258 monthly peakMarch 202513 monthly peakApril 202510 monthly peakMay 202515 monthly peakJune 20256 monthly peakJuly 20256 monthly peakAugust 20258 monthly peakSeptember 202510 monthly peakOctober 20258 monthly peakNovember 202511 monthly peakDecember 202510 monthly peakJanuary 20269 monthly peakFebruary 20267 monthly peakMarch 20268 monthly peakApril 20269 monthly peakMay 202611 monthly peakJune 20267 monthly peakJuly 20269 monthly peakAugust 20268 monthly peakSeptember 202619 monthly peak
Monthly peak

The last four months

Show:

The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.

05101521July 2026August 2026September 2026October 2026July 20269 peak — daily detail belowAugust 20268 peak — hourly detail belowSeptember 202619 peak — hourly detail below
Monthly peakHas finer data

July 2026

31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.

02571001 Jul06 Jul11 Jul16 Jul21 Jul26 Jul31 JulWednesday 01 July 20266 peakThursday 02 July 20264 peakFriday 03 July 20262 peakSaturday 04 July 20265 peakSunday 05 July 20264 peakMonday 06 July 20264 peakTuesday 07 July 20265 peakWednesday 08 July 20264 peakThursday 09 July 20263 peakFriday 10 July 20265 peakSaturday 11 July 20268 peakSunday 12 July 20264 peakMonday 13 July 20263 peakTuesday 14 July 20264 peakWednesday 15 July 20265 peakThursday 16 July 20264 peakFriday 17 July 20266 peakSaturday 18 July 20265 peakSunday 19 July 20263 peakMonday 20 July 20263 peakTuesday 21 July 20263 peakWednesday 22 July 20264 peakThursday 23 July 20269 peakFriday 24 July 20263 peakSaturday 25 July 20264 peakSunday 26 July 20263 peakMonday 27 July 20264 peakTuesday 28 July 20264 peakWednesday 29 July 20263 peakThursday 30 July 20265 peakFriday 31 July 20268 peak

August 2026

31 days as the curve, each the highest figure that day. Behind it, 154 hourly samples from 14 Aug, which is as far back as the source keeps every hour. Weekends are shaded.

0246901 Aug06 Aug11 Aug16 Aug21 Aug26 Aug31 AugSaturday 01 August 20264 peakSunday 02 August 20264 peakMonday 03 August 20268 peakTuesday 04 August 20263 peakWednesday 05 August 20262 peakThursday 06 August 20264 peakFriday 07 August 20264 peakSaturday 08 August 20264 peakSunday 09 August 20265 peakMonday 10 August 20263 peakTuesday 11 August 20264 peakWednesday 12 August 20265 peakThursday 13 August 20264 peakFriday 14 August 20263 peakSaturday 15 August 20266 peakSunday 16 August 20264 peakMonday 17 August 20263 peakTuesday 18 August 20264 peakWednesday 19 August 20264 peakThursday 20 August 20263 peakFriday 21 August 20263 peakSaturday 22 August 20267 peakSunday 23 August 20266 peakMonday 24 August 20265 peakTuesday 25 August 20264 peakWednesday 26 August 20262 peakThursday 27 August 20264 peakFriday 28 August 20264 peakSaturday 29 August 20264 peakSunday 30 August 20266 peakMonday 31 August 20265 peak

September 2026

13 days as the curve, each the highest figure that day. Behind it, 107 hourly samples. Each dip is a night. Weekends are shaded.

0510152101 Sep03 Sep05 Sep07 Sep09 Sep11 Sep13 SepTuesday 01 September 20263 peakWednesday 02 September 20263 peakThursday 03 September 20263 peakFriday 04 September 20262 peakSaturday 05 September 20263 peakSunday 06 September 20263 peakMonday 07 September 20264 peakTuesday 08 September 202613 peakWednesday 09 September 202619 peakThursday 10 September 20267 peakFriday 11 September 20269 peakSaturday 12 September 20269 peakSunday 13 September 20264 peak

October 2026

Moonbase Alpha was released on Jul 6, 2010.

Not out yet.There is nothing to draw for this month.
Nothing here is interpolated or estimated; where a sample is missing the line is broken.

Game information

Free to playUpdated 13 Sep 2026, 04:25 UTC
App ID
39000
Developer
Virtual Heroes, Army Game Studio
Publisher
NASA
Release date
Jul 6, 2010
Platforms
Windows
Install size
1.11 GB
Genres
Adventure, Simulation, Strategy
Game modes
Single-player, Multi-player, Co-op
Controller support
Unknown

Features & support

Steam features

Valve Anti-Cheat enabledStatsSteam LeaderboardsFamily Sharing

Controllers & input

Accessibility

Popular tags

SpaceSimulationFree to PlayMultiplayerOnline Co-OpFunnyMemesStrategyAdventureOpen WorldWalking SimulatorCo-opSandboxRealisticComedyThird PersonMassively MultiplayerSingleplayerFirst-PersonPuzzle
About this gameFull description from Steam
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. Utilizing solar energy and regolith processing, the moonbase has become self-sufficient and plans for further expansion are underway. In Moonbase Alpha, you assume the exciting role of an astronaut working to further human expansion and research. Returning from a research expedition, you witness a meteorite impact that cripples the life support capability of the settlement. With precious minutes ticking away, you and your team must repair and replace equipment in order to restore the oxygen production to the settlement. Team coordination along with the proper use and allocation of your available resources (player controlled robots, rovers, repair tools, etc.) are key to your overall success. There are several ways in which you can successfully restore the life support system of the lunar base, but since you are scored on the time spent to complete the task, you have to work effectively as a team, learn from decisions made in previous gaming sessions, and make intelligence decisions in order to top the leaderboards. Key features: Team up with your friends... The fate of a lunar colony rests on the shoulders of you and your team. Communicate and coordinate efforts with up to six players (LAN and internet) by using voice over communication. Utilize the latest in NASA technology... A fully functional rover that utilizes lunar physics is available to transport both players and supplies to all reaches of the lunar colony. You can build and pilot your own repair robot in order to fix crucial systems before time runs out. Immerse yourself in an awe-inspiring lunar environment... Take your first steps on the moon's surface in a truly accurate lunar moonscape that is unmatched in any other application. Compete with your friends to reach the top of the leaderboards... Do you have what takes it to be number one? When you win, your score will automatically be posted to the leaderboards for everyone to see. A unique experience each time.. With multiple paths for game success, you'll need to learn to work effectively as a team, learn from decisions made in previous gaming sessions, and make intelligent decisions in order to top the leaderboards. Tailor your game to fit your gameplay style... Do you want to play with two players or six? With multiple game maps you can select the game environment that best suits your team's needs.
Content & age ratings1 regional rating

Regional ratings

ESRBe
System requirementsMinimum and recommended hardware

Minimum

Minimum OS *: Win XP SP3 Processor: 2.0+ GHZ Single Core Processor Memory: 2 GB of System RAM Graphics: NVIDIA 7000-series or ATI Radeon X1900 Video Card DirectX®: DirectX 9.0c Hard Drive: 2 GB of Free Hard Drive Space Sound: DirectX 9.0c compliant audio

Recommended

Recommended OS *: Win XP SP3 / Vista / Windows 7 Processor: 2.4+ GHz Dual Core Processor Memory: 4+ GB of System RAM Graphics: NVIDIA 9000+ or ATI Radeon 3600+ Video Card DirectX®: DirectX 9.0c Hard Drive: 5 GB of Free Hard Drive Space
Supported languages1 languages
LanguageFull audio
English

A blank audio cell means full audio was not marked in the returned language list.

Screenshots & trailersScreenshots and trailers

Trailers

AchievementsTotal count and selected achievements

2 developer announcements, Oct 2015 to Oct 2015 · times in UTC

October

  1. Moonbase Alpha 2!

    Are you ready to go back to the moon? Virtual Heroes has announced the Kickstarter to fund the making of Moonbase Alpha 2. New look, same great text-to-speech voice. Help make this a reality!…

    lmorris
  2. Moonbase Alpha 2!

    Are you ready to go back to the moon? Virtual Heroes has announced the Kickstarter to fund the making of Moonbase Alpha 2. New look, same great text-to-speech voice. Help make this a reality!…

    lmorris

All games on this site