Mars Underground

Mars Underground cover art

Publisher: Matt Sanderson · Release date: 2019-03-14

Free to play on Steam

Steam gives Mars Underground away: download it and play without paying anything. The keys listed under its name below are usually for paid editions or upgrades, so check what one includes before you buy.

Play free on Steam

Mars Underground is an apocalyptic adventure where you relive the same day over and over. With each cycle new items can be picked up and topics unlocked.​ Explore the possibilities of this timeloop and uncover multiple endings.

Mars Underground prices

Prices last checked . Each is the price the store lists; marketplaces add a service fee at checkout.

Questions about Mars Underground

Do these Mars Underground prices include fees?

Not always. Stores that sell their own keys, such as Steam and GOG, add no service fee, though sales tax is added at checkout in the US and Canada. Marketplaces add a service fee at checkout, and some payment methods add their own, so on a marketplace the total at checkout will be higher than the price listed here.

Is it safe to buy a cheap Mars Underground key?

Official stores sell their own keys. Marketplaces and third-party sellers sell keys from other sellers: check the seller and the key’s region before you buy, and pay through the store’s own checkout.

Mars Underground reviews

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Steam: Very Positive (94%) · 57 reviews