Free Mars Games on Steam
Steam currently has 313 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 10/29/2025.
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. Build Master: MarsVille
Build Master: MarsVille is a city-building and strategy game that invites you to create your Martian colony with your engineering genius and building skills. Form alliances, trade resources, and conquer rival colonies. Embrace the challenge and become the ultimate Build Master on Mars!
Build Master: MarsVille holds the #1 spot for "best free Mars game on Steam" with a Player Score of 43. Its score was calculated by analyzing a total of 230 reviews on Steam. This breaks down to a total of 94 positive reviews and 136 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Build Master: MarsVille on the Steam Deck (though some functionality may be limited).
| Release Date | 12/12/2023 |
| Developers | |
| Publisher | FIRST FUN HONG KONG LIMITED |
| Steam App Id | 2366120 |
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 10,586 reviews on Steam. This breaks down to a total of 10,214 positive reviews and 372 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. 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 72, placing it in the #3 spot for the best free Mars games. Its score was calculated by analyzing a total of 44 reviews on Steam. This breaks down to a total of 36 positive reviews and 8 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 | 9/30/2025 |
| Developer | Team Future |
| Publisher | Team Future |
| Steam App Id | 3978420 |
4. 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 #4 spot for the best free Mars games. Its score was calculated by analyzing a total of 539 reviews on Steam. This breaks down to a total of 408 positive reviews and 131 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 |
5. Red Planet Rampage
A build-your-own-gun FPS! Play online, splitscreen or vs. AI in this goofy party game with over 600 unique weapons! Outbid your opponents and assemble the wildest weapon on Mars!
Red Planet Rampage has achieved a Player Score of 79, placing it in the #5 spot for the best free Mars games. Its score was calculated by analyzing a total of 51 reviews on Steam. This breaks down to a total of 47 positive reviews and 4 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is not possible to play or run Red Planet Rampage on the Steam Deck.
| Release Date | 6/5/2024 |
| Developer | Hackerspace NTNU |
| Publisher | Hackerspace NTNU |
| Steam App Id | 2717710 |
6. Cyber Space Driver
This is little project in the spirit of endless runner genre, so as this a real CyberPunk style project, this is... buggy, synthwavy, peace of junk-art. Cyber Space Driver... Drive straight, that's it.
Cyber Space Driver has achieved a Player Score of 69, placing it in the #6 spot for the best free Mars games. Its score was calculated by analyzing a total of 22 reviews on Steam. This breaks down to a total of 18 positive reviews and 4 negative reviews — making it "Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Cyber Space Driver on the Steam Deck.
| Release Date | 8/21/2023 |
| Developers | |
| Publishers | |
| Steam App Id | 2542380 |
7. Space Mechanic Simulator: Prologue
Space Mechanic Simulator: Prologue is a story prelude to the full version, which will introduce you to the world of cosmic repairs, greedy corporations, and cutting-edge technology.
Space Mechanic Simulator: Prologue has achieved a Player Score of 71, placing it in the #7 spot for the best free Mars games. Its score was calculated by analyzing a total of 63 reviews on Steam. This breaks down to a total of 50 positive reviews and 13 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 Space Mechanic Simulator: Prologue on the Steam Deck (though some functionality may be limited).
| Release Date | 1/30/2023 |
| Franchise | Atomic Jelly |
| Developer | Atomic Jelly |
| Publishers | |
| Steam App Id | 1634280 |
8. Fast Finger Rule
Fast Finger Rule is a minimalistic battle planet duel simulator. To make precise shots you just need to click on your planet at right time. Game has 10+ planet shield types and 15+ planets of 3 different tiers.
Fast Finger Rule has achieved a Player Score of 62, placing it in the #8 spot for the best free Mars games. Its score was calculated by analyzing a total of 8 reviews on Steam. This breaks down to a total of 6 positive reviews and 2 negative reviews — making it "8 user reviews" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Fast Finger Rule on the Steam Deck (though some functionality may be limited).
9. Rover Mechanic Challenge - ERC Competition
𝗘𝗥𝗖 𝗥𝗼𝘃𝗲𝗿 𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝗰 𝗖𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗲 is an e-tournament based on the world's only simulator for repairing Mars Rovers. Take part in solving challenging tasks and become the master of leader board.
Rover Mechanic Challenge - ERC Competition has achieved a Player Score of 63, placing it in the #9 spot for the best free Mars games. Its score was calculated by analyzing a total of 15 reviews on Steam. This breaks down to a total of 11 positive reviews and 4 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 | 9/14/2020 |
| Developers | |
| Publishers | |
| Steam App Id | 1368970 |
10. Yavi
A retro styled 2D Sci-Fi RPG including robot fighting, hilarious dialogues and a great story that will make you laugh and cry - if you're a sensitive person (which is nothing to be ashamed of!).
Yavi has achieved a Player Score of 73, placing it in the #10 spot for the best free Mars games. Its score was calculated by analyzing a total of 28 reviews on Steam. This breaks down to a total of 24 positive reviews and 4 negative reviews — making it "Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Yavi on the Steam Deck (though some functionality may be limited).
More Free Mars Games
Explore even more rankings for the 32 best free Mars games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 54 | 12/12/2023 | 43 | Free | Steam Charts | |
| 9 | 12/19/2021 | 94 | Free | Steam Charts | |
| 2 | 9/30/2025 | 72 | Free | Steam Charts | |
| 1 | 11/27/2018 | 72 | Free | Steam Charts | |
| 1 | 6/5/2024 | 79 | Free | Steam Charts | |
| 1 | 8/21/2023 | 69 | Free | Steam Charts | |
| 1 | 1/30/2023 | 71 | Free | Steam Charts | |
| 1 | 11/1/2021 | 62 | Free | Steam Charts | |
| 1 | 9/14/2020 | 63 | Free | Steam Charts | |
| 1 | 12/13/2021 | 73 | Free | Steam Charts | |
 | 1 | 5/24/2021 | 73 | Free | Steam Charts | |
 | 1 | 6/9/2020 | 81 | Free | Steam Charts | |
 | 1 | 4/21/2023 | 69 | Free | Steam Charts | |
 | 1 | 10/23/2021 | 83 | Free | Steam Charts | |
![Operation Satoshi [Early Version Alpha] steam charts](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2135380/header.jpg) | 1 | 11/8/2022 | 52 | Free | Steam Charts | |
 | 1 | 10/9/2022 | 71 | Free | Steam Charts | |
 | 1 | 5/19/2021 | 53 | Free | Steam Charts | |
 | 1 | 12/24/2020 | 47 | Free | Steam Charts | |
 | 1 | 8/10/2022 | 47 | Free | Steam Charts | |
 | 1 | 4/19/2024 | 40 | 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. (2025, October 29). Steam Store. Steam Store.
- Valve Corporation. (2025, October 29). Build Master: MarsVille on Steam. Steam Store.
- Valve Corporation. (2025, October 14). The Planet Crafter: Prologue on Steam. Steam Store.
- Valve Corporation. (2025, November 9). Doom 3: Phobos on Steam. Steam Store.
- Valve Corporation. (2025, September 27). Project Eagle: A 3D Interactive Mars Base on Steam. Steam Store.
- Valve Corporation. (2025, November 9). Red Planet Rampage on Steam. Steam Store.
- Valve Corporation. (2025, October 18). Cyber Space Driver on Steam. Steam Store.
- Valve Corporation. (2025, October 6). Space Mechanic Simulator: Prologue on Steam. Steam Store.
- Valve Corporation. (2025, September 27). Fast Finger Rule on Steam. Steam Store.
- Valve Corporation. (2025, August 15). Rover Mechanic Challenge - ERC Competition on Steam. Steam Store.
- Valve Corporation. (2025, October 8). Yavi on Steam. Steam Store.