Explore the vast terrains of Mars, generated from real NASA satellite data, and survive threats like dust storms by discovering randomized supply caches and habitats. Adventure on foot or in driveable rovers with this otherworldly first-person sandbox.
All Reviews:
Mostly Positive (32) - 75% of the 32 user reviews for this game are positive.
Release Date:
May 17, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Random Seed Games is currently only one full-time developer and a few part-time contributors. I want to get as much feedback as possible on the Survival Sandbox gameplay systems while I continue to expand the game and add features in preparation for a Story Mode.”

Approximately how long will this game be in Early Access?

“It is likely that Lacuna Passage will be in Early Access for at least a year before Story Mode is available.”

How is the full version planned to differ from the Early Access version?

“Story Mode is my long term goal, but I will respond to player's interests with the Survival Sandbox. I will be targeting monthly updates that will address bugs and add new features.”

What is the current state of the Early Access version?

“Lacuna Passage currently exists only as a Survival Sandbox, with an emphasis on the "Sandbox". There is no narrative. There is no combat. This is a very small game with light survival mechanics. The primary activity is exploration. If you are satisfied by "walking simulators" or have an interest in space photography you might find the Early Access version compelling. If you want a more structured and goal-oriented experience you might want to wait until the Story Mode is finished.”

Will the game be priced differently during and after Early Access?

“I may gradually raise the price as I ship new content and features.”

How are you planning on involving the Community in your development process?

“The main reason I am releasing on Steam Early Access is so that I can get feedback from players. I plan to engage with the community on the Steam discussion forums and the official feedback forum that is accessible through the game's main menu.”
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Recent updates View all (8)

March 31

Radiation Storms Update - v0.63

Radiation storms are a new environmental hazard for Lacuna Passage. They will not occur if you pick the "No Storms" scenario, but otherwise they are randomized low levels of radiation exposure that you can only escape by taking shelter in a habitat.

This update is a bit lighter on additional features than I was hoping for, but I just wanted to get something out for this month. Because of the rush to publish, there are also some balance issues that may need to be addressed in the near future since I didn't have time to properly test everything.

The main change that may cause balance issues is the lengthening of the day-night cycle. Players have requested for quite some time now that the days should be extended a bit to feel more realistic. Previously, 30 minutes real-time equated to a full in-game day. Now this has been doubled to 1 hour real-time. Almost every variable in the game will be affected by this change, and so the ramifications aren't fully known yet. Please report any major issues via the feedback forum.

There are several other changes in this update as well. Here are all the major additions that you can expect to find:

Change Log
  • Randomized radiation storms have been added.
  • New datapad documents have been added to help explain dust storms, radiation storms, and radiation zones (map boundaries).
  • A failed or turned off heater will now eventually cause water tanks to freeze. Once the internal habitat temperature reaches below 0 Celsius water will be slowly lost to freezing.
  • Fixed a visual bug with the PRT maintenance screen.
  • Components installed in exterior modules will degrade slower if they are not essential for module operation. For example, if you have 5 fuses installed, 2 of them will degrade slower than the first 3 because only 3 are required for operation.
  • Navigation systems are now based on proximity to WayStats during a dust storm. The more intense the storm, the closer you will need to be to an operational WayStat in order to maintain your navigation systems.
  • The movement speed penalty during a dust storm has been drastically reduced, but now your exhaustion, calorie and water consumption are increased during a dust storm.
  • The degradation rates of exterior module components are now increased for habitats that are in the area of a passing dust storm.
  • The charge rate of an equipped portable solar panel while on EVA is now identical to the charge rate with it equipped in a panel slot of an exterior module. This has reduced the EVA charge rate enough that it can no longer surpass the battery drain of your suit, but it does drastically reduce the speed that your suit battery will drain. This is to prevent the exploit where you could charge your suit battery quickly with an equipped portable solar panel and then dump the charge back into your habitat battery.
  • The scanner overlay has been fixed for ultrawide monitors.
  • One real-time hour now equals 1 in-game day/sol.
  • Death from EVA suit battery being depleted (death from heat loss) now takes much longer to bring it in line with other systems and be more realistic.
  • Fixed a bug that caused exiting a pop tent to result in falling through the map.

Additional Changes in 0.63.1
  • Increased the supplemental recharge rate of equipped portable solar panel while on EVA. Still won't overcome the normal drain of your battery, but it reduces the rate of discharge quite drastically.
  • Fixed a major bug causing an incorrect passing of time when sleeping, crafting, salvaging, or repairing.

Additional Changes in 0.63.2
  • Fixed a bug causing game freezes to occur while repairing components.
  • Fixed a bug affecting water production after frozen storage tanks are reheated.
  • Fixed a bug causing removed components to sometimes still appear visible in exterior module slots.
5 comments Read more

January 31

Driveable Rovers Update - v0.62

Driveable rovers are finally here!

There will be at least one rover guaranteed to spawn in every playthrough. There are two possible areas towards the center of the map where they may spawn randomly, but if you can't find any there you can be sure to find one parked at the third habitat. If you haven't played much before, the third habitat is also randomized, so happy hunting!

If you choose to continue a saved game keep in mind that you may run into errors, but if you have already discovered a rover previously, then you should be able to return to it and it will now be operable. I would still recommend starting a fresh save however.

Here are all the major additions that have made it into this update:

Change Log
  • PRTs found in the environment are now driveable.
  • Added Charged Backup Battery items that can be used to recharge your suit while out on an EVA, which after using will change to either a Discharged Backup Battery or an Expired Backup Battery in your inventory. A Discharged Backup Battery can be recharged at a crafting bench as long as there is enough reserve battery charge in the habitat, and an Expired Backup Battery will no longer hold a charge and is only useful for salvaging other materials from it. The chance to become an Expired Backup Battery is 1 in 20.
  • Oxygen Filled Canisters now have a chance to become Broken Canisters after using them to refill your oxygen while on an EVA. The chance to become a Broken Canister is 1 in 20.
  • New games will now start with one Oxygen Filled Canister and one Charged Backup Battery already in your player inventory.
  • Refined and lowered the degradation rate of slots with no installed components.
  • Added a “Withdraw All Items” option when exploring the contents of item containers.
  • Added a “Move All” option when selecting a single stack of items to transfer between containers.
  • The datapad will now slightly lower itself while walking so that you can more clearly see where you are going.
  • You can now enable and disable the scanner while viewing the datapad.

Additional Changes in v0.62.1
  • Fixed bug causing PRTs to float off the ground and become inaccessible.
  • Possible fix for issue with drifting colliders on parked PRTs.
  • New model for the hand holding the datapad.
  • Fixed camera jitter when transitioning between states like equipping the datapad or running/walking.
  • Fixed issue where the datapad was not changing to the lowered position if equipped while walking.

Additional Changes in v0.62.2
  • Broken components can now be removed from exterior habitat modules and used to salvage for parts.
  • Fixed bug causing radiation to not be applied while driving the PRT.
  • Fixed bug causing a black screen while exiting the habitat.
  • Fixed the navigation zoom level being reset when changing datapad screens.
  • Fixed bug causing PRT batteries to charge above 100% with an RTG installed.
8 comments Read more
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“A gorgeous game of mystery and survival” - Kotaku

"I’ll happily play" - Rock Paper Shotgun

"Lacuna Passage stands out from the competition with gameplay and "realistic" environments" - Jeuxvideo.com

"A massive, convincing game world" - Red Bull

"A very realistic portrayal of what life is like on the Red Planet" - GameSkinny

"The game has captured the imagination of many space and science fiction fans" - Mashable

"There is plenty to enjoy about Lacuna Passage" - GAMR

"Pretty damn neat" - Select Button

"The landscapes are magnificent" - Game-Guide

"The game's music is completely off the hook" - Cinema Blend

"They’ve captured the vibe of Mars very well" - Tech Raptor

About This Game

You wake in an landing pod, check your equipment, and venture out onto the red Martian soil in search of a nearby habitat. With 25 square miles of the Red Planet to explore and survive, you must gather resources from randomized points-of-interest, supply caches, and other habitats in order to continue your mission. But survival is more than just tracking status bars. Maintaining your life-support equipment is just as important as maintaining your health. Lacuna Passage’s Survival Sandbox will allow you to test drive the core game mechanics in Steam Early Access ahead of the upcoming Story Mode.

Explore a massive terrain generated from actual Mars satellite imagery. With features generated from scans collected by the HiRISE project and details painstakingly designed to reflect the photography captured by planetary rovers, this is as close as you can get to visiting the true Red Planet.

Survive the harsh Martian environment with mechanics based on real health metrics like blood glucose levels, heart rate, caloric intake, and more. You will feel like a true interplanetary pioneer as you conquer the elements and survive randomized threats like dust storms.

Capture the beauty of Mars with an in-game photography mechanic that allows you to document your discoveries. Photos are saved to your computer at full 1920x1080 resolution and can be referenced in-game where you can set objective points to navigate back to where the photos were taken.

Interact with the various astronaut technologies through your dependable datapad. You will need to manage inventories, salvage and craft supplies, and repair vital life support systems in order to survive the desolate landscapes of Mars. Find and drive rovers to help manage multiple habitats.

System Requirements

Mac OS X
    • OS: Windows 7/8.1/10
    • Processor: Intel Core i3
    • Memory: 2 GB RAM
    • Graphics: nVidia GTX 480, AMD Radeon 7870
    • Storage: 5 GB available space
    • OS: OSX (64 bit versions)
    • Processor: 2 GHz Equivalent CPU
    • Memory: 4 GB RAM
    • Graphics: OpenGL 3 Compatible GPU
    • Storage: 5 GB available space
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