687 Days on Mars Demo is free on Steam

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Updated 2h ago 12 stores next in 97 min 3,598 logged since Sep 2026 Archive

Our record

We first recorded this on 12 October 2026. Listed on Steam. Picked up from Steam, then checked against the store.

From the store page

687 Days on Mars invites you to try the free demo! Step onto the Red Planet and test your survival skills in the harshest environment known to humankind. Manage every breath, every drop of water, and every spark of energy as you fight to endure Mars itself.

Excerpt from the Steam store page. Full description there.

Genres and features

AdventureIndieSimulationSingle-player

Questions

Is it really free?

Yes. 687 Days on Mars Demo is free right now on Steam, with nothing to pay.

Is this the full game?

No. A demo is a portion of 687 Days on Mars Demo — usually the opening section — published so you can try it. It is free permanently, but it is not the complete game.

Where do I claim it?

On the official Steam page. We link straight there — we never host game files or act as a middleman.

Giveaway history

1 from our archive

Earlier giveaways of 687 Days on Mars Demo
Ended	Store	Ran for
—	Steam	—

Recorded as each giveaway ran, not reconstructed afterwards. Publishers repeat themselves, so a title that has been free before is a reasonable bet to return.