Free Mars Games on Steam
Steam currently has 332 Mars games available to download and play. Explore our list of the best free games ranked by popularity and ratings. Data for this list is calculated from reviews and player counts reported directly by Steam and will be updated in real-time. Free Mars game rankings were last updated on 6/22/2026.
Looking for more? Explore other lists such as:
- Best mars games on Steam
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- Most played Steam games
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1. DarkOrbit Reloaded
Dark Orbit is a free-2-play space MMO where three companies battle for galactic domination. Customize ships, trade resources, fight aliens and uncover a grand conspiracy on your epic cosmic journey. Thrilling PvP and PvE missions await! Will you lead your faction beyond the final frontier?
DarkOrbit Reloaded holds the #1 spot for "best free Mars game on Steam" with a Player Score of 33. Its score was calculated by analyzing a total of 434 reviews on Steam. This breaks down to a total of 130 positive reviews and 304 negative reviews — making it "Mostly Negative" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 12/3/2025 |
| Developer | Bigpoint GmbH |
| Publisher | Bigpoint GmbH |
| Steam App Id | 4054110 |
2. The Planet Crafter: Prologue
Experience the first stages of terraforming an entire planet in this space survival open world terraforming crafting game prologue. Explore, survive, collect, build your base then create oxygen, heat and pressure to make an hostile planet livable for humanity.
The Planet Crafter: Prologue has achieved a Player Score of 94, placing it in the #2 spot for the best free Mars games. Its score was calculated by analyzing a total of 10,698 reviews on Steam. This breaks down to a total of 10,314 positive reviews and 384 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 12/19/2021 |
| Developer | Miju Games |
| Publisher | Miju Games |
| Steam App Id | 1830840 |
3. Orange Cast: Prologue
Prologue to Orange Cast, an atmospheric adventure in a large-scale setting where Soviet and Western science fiction are combined itself. As a humanity’s elite space trooper, you take on a heroic, action-packed adventure throughout the galaxy.
Orange Cast: Prologue has achieved a Player Score of 48, placing it in the #3 spot for the best free Mars games. Its score was calculated by analyzing a total of 125 reviews on Steam. This breaks down to a total of 60 positive reviews and 65 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Orange Cast: Prologue on the Steam Deck.
| Release Date | 12/24/2020 |
| Franchise | Valkyrie Initiative |
| Developer | Team Rez |
| Publisher | Valkyrie Initiative |
| Steam App Id | 1489880 |
4. Last Resort
Last Resort is a small co-op shooter in which you and up to 3 others defend humanity's first hotel on Mars against hostile aliens. Defend & power up generators, upgrade your weapons and gun down hordes of aliens to save the hotel!
Last Resort has achieved a Player Score of 55, placing it in the #4 spot for the best free Mars games. Its score was calculated by analyzing a total of 141 reviews on Steam. This breaks down to a total of 80 positive reviews and 61 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 6/28/2021 |
| Developer | Team Soupvision |
| Publisher | Breda University of Applied Sciences |
| Steam App Id | 1491650 |
5. BATTLE STEED : GUNMA (배틀 스티드 : 군마)
BATTLE STEED:GUNMA is a team battle TPS game implemented with giant robots. Join as a mercenary and win with your team in the battle that takes place in a competition between military companies from each countries to acquire new resources discovered on the space planets in the near future.
BATTLE STEED : GUNMA (배틀 스티드 : 군마) has achieved a Player Score of 47, placing it in the #5 spot for the best free Mars games. Its score was calculated by analyzing a total of 71 reviews on Steam. This breaks down to a total of 33 positive reviews and 38 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 8/10/2022 |
| Developer | MGAME Corporation |
| Publisher | MGAME Corporation |
| Steam App Id | 1661020 |
6. Doom 3: Phobos
Waking up on Mars with no memory and a wound you can’t explain, you begin a desperate search for answers - about yourself, your past, and the catastrophe looming over two worlds.
Doom 3: Phobos has achieved a Player Score of 68, placing it in the #6 spot for the best free Mars games. Its score was calculated by analyzing a total of 98 reviews on Steam. This breaks down to a total of 73 positive reviews and 25 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 9/30/2025 |
| Developer | Team Future |
| Publisher | Team Future |
| Steam App Id | 3978420 |
7. Mars vs. Robots
Defend Mars from the Robots in this innovative roguelike survival miner. Mine Valueable Resources, Build Powerful Machines, and Fight! Will your planet fall to the greedy humans or will your defence be Robust
Mars vs. Robots has achieved a Player Score of 74, placing it in the #7 spot for the best free Mars games. Its score was calculated by analyzing a total of 14 reviews on Steam. This breaks down to a total of 13 positive reviews and 1 negative reviews — making it "Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
8. Alien Tag
Reject Monke, Become Alien. Discord.gg/AlienTag. AlienTagVR.com.
Alien Tag has achieved a Player Score of 41, placing it in the #8 spot for the best free Mars games. Its score was calculated by analyzing a total of 56 reviews on Steam. This breaks down to a total of 21 positive reviews and 35 negative reviews — making it "Mostly Negative" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Alien Tag on the Steam Deck.
| Release Date | 4/19/2024 |
| Developer | IRLDLC.COM INC |
| Publisher | IRLDLC.COM INC |
| Steam App Id | 2672170 |
9. M.A.R.S.S.
MARSS is a reaction-oriented and puzzle laden RTS game. Use the power of numbers, mandatory friendship and space-gulag threats to take back Mars and expand the robocommunist empire!
M.A.R.S.S. has achieved a Player Score of 74, placing it in the #9 spot for the best free Mars games. Its score was calculated by analyzing a total of 36 reviews on Steam. This breaks down to a total of 31 positive reviews and 5 negative reviews — making it "Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 5/24/2021 |
| Developer | Patata Games Studio |
| Publisher | Patata Games Studio |
| Steam App Id | 1583900 |
10. Project Eagle: A 3D Interactive Mars Base
An interactive art demo that showcases what a future base on Mars could look like. Project Eagle isn't a game - but an exploration of mankind's possible future.
Project Eagle: A 3D Interactive Mars Base has achieved a Player Score of 72, placing it in the #10 spot for the best free Mars games. Its score was calculated by analyzing a total of 545 reviews on Steam. This breaks down to a total of 413 positive reviews and 132 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Project Eagle: A 3D Interactive Mars Base on the Steam Deck (though some functionality may be limited).
| Release Date | 11/27/2018 |
| Franchise | Blackbird Interactive (BBI) |
| Developer | Blackbird Interactive |
| Publisher | Blackbird Interactive |
| Steam App Id | 224000 |
More Free Mars Games
Explore even more rankings for the 32 best free Mars games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 41 | 12/3/2025 | 33 | Free | Steam Charts | |
| 8 | 12/19/2021 | 94 | Free | Steam Charts | |
| 2 | 12/24/2020 | 48 | Free | Steam Charts | |
| 2 | 6/28/2021 | 55 | Free | Steam Charts | |
| 1 | 8/10/2022 | 47 | Free | Steam Charts | |
| 1 | 9/30/2025 | 68 | Free | Steam Charts | |
| 1 | 11/15/2024 | 74 | Free | Steam Charts | |
| 1 | 4/19/2024 | 41 | Free | Steam Charts | |
| 1 | 5/24/2021 | 74 | Free | Steam Charts | |
| 1 | 11/27/2018 | 72 | Free | Steam Charts | |
 | 1 | 10/21/2020 | 45 | Free | Steam Charts | |
 | 1 | 6/9/2020 | 82 | Free | Steam Charts | |
 | 1 | 9/16/2024 | 68 | Free | Steam Charts | |
 | 1 | 1/30/2023 | 71 | Free | Steam Charts | |
 | 1 | 1/18/2022 | 50 | Free | Steam Charts | |
 | 1 | 6/5/2024 | 79 | Free | Steam Charts | |
 | 1 | 12/18/2020 | 64 | Free | Steam Charts | |
 | 1 | 5/19/2021 | 55 | Free | Steam Charts | |
 | 1 | 10/9/2022 | 71 | Free | Steam Charts | |
 | 1 | 3/12/2025 | 74 | Free | Steam Charts |
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Player counts and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.
- Valve Corporation. (2026, June 22). Steam Store. Steam Store.
- Valve Corporation. (2026, June 22). DarkOrbit Reloaded on Steam. Steam Store.
- Valve Corporation. (2026, April 3). The Planet Crafter: Prologue on Steam. Steam Store.
- Valve Corporation. (2026, June 22). Orange Cast: Prologue on Steam. Steam Store.
- Valve Corporation. (2026, April 3). Last Resort on Steam. Steam Store.
- Valve Corporation. (2026, May 27). BATTLE STEED : GUNMA (배틀 스티드 : 군마) on Steam. Steam Store.
- Valve Corporation. (2026, June 12). Doom 3: Phobos on Steam. Steam Store.
- Valve Corporation. (2026, June 18). Mars vs. Robots on Steam. Steam Store.
- Valve Corporation. (2026, May 6). Alien Tag on Steam. Steam Store.
- Valve Corporation. (2026, June 21). M.A.R.S.S. on Steam. Steam Store.
- Valve Corporation. (2026, June 6). Project Eagle: A 3D Interactive Mars Base on Steam. Steam Store.