Free Underground Games on Steam
Steam currently has 721 Underground 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 Underground game rankings were last updated on 2/13/2025.
Looking for more? Explore other lists such as:
- Best underground games on Steam
- Best underground Steam Deck games
- Best underground Steam games for Mac OS
- Best underground Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. Underworld Idle
An idle dungeon management game, where high tier units can create low tier units.
Underworld Idle holds the #1 spot for "best free Underground game on Steam" with a Player Score of 69. Its score was calculated by analyzing a total of 1,116 reviews on Steam. This breaks down to a total of 803 positive reviews and 313 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 Underworld Idle on the Steam Deck (though some functionality may be limited).
| Release Date | 2/2/2023 |
| Developer | Aleksandr Golovkin |
| Publisher | Aleksandr Golovkin |
| Steam App Id | 1540960 |
2. Otherworld Legends 战魂铭人
A "blood-pumping, face-bashing" roguelike brawler. Master heroes of your choice, craft uniquely broken builds, and hack & pummel through a myriad of dungeons in a thrilling rampage.
Otherworld Legends 战魂铭人 has achieved a Player Score of 59, placing it in the #2 spot for the best free Underground games. Its score was calculated by analyzing a total of 1,158 reviews on Steam. This breaks down to a total of 694 positive reviews and 464 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 | 4/28/2022 |
| Developer | ChillyRoom |
| Publisher | ChillyRoom |
| Steam App Id | 1761380 |
3. Cave Crawlers
Cave Crawlers is a 1-10 player rogue lite set deep underground in a system of randomly generated caves. Players use weapons, spells, and talents to defeat the unique bosses and enemies found in each biome.
Cave Crawlers has achieved a Player Score of 90, placing it in the #3 spot for the best free Underground games. Its score was calculated by analyzing a total of 2,667 reviews on Steam. This breaks down to a total of 2,497 positive reviews and 170 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Cave Crawlers on the Steam Deck (though some functionality may be limited).
| Release Date | 7/10/2023 |
| Developer | Heroic Pyxel LLC |
| Publisher | Heroic Pyxel LLC |
| Steam App Id | 2143030 |
4. Molementum
Molementum is a 3D party action game where you assume the role of a mole criminal to rob mines of their precious gems. Grab up to 3 friends and scramble your way through mines while engaging in various acts of competitive mischief as you try to become the most notorious mole criminal.
Molementum has achieved a Player Score of 69, placing it in the #4 spot for the best free Underground games. Its score was calculated by analyzing a total of 21 reviews on Steam. This breaks down to a total of 17 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 Molementum on the Steam Deck (though some functionality may be limited).
| Release Date | 5/3/2024 |
| Developer | Plushie Bomb Studios |
| Publisher | Plushie Bomb Studios |
| Steam App Id | 2841830 |
5. 魔能纪元
An IDLE role-playing game
魔能纪元 has achieved a Player Score of 47, placing it in the #5 spot for the best free Underground games. Its score was calculated by analyzing a total of 59 reviews on Steam. This breaks down to a total of 27 positive reviews and 32 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 | 6/15/2022 |
| Developer | Fireball Studio |
| Publisher | Fireball Studio |
| Steam App Id | 1824840 |
6. Mr. Prepper: Prologue
Mr. Prepper: Prologue is a free standalone version of the game Mr. Prepper, featuring an essential part of the story.
Mr. Prepper: Prologue has achieved a Player Score of 80, placing it in the #6 spot for the best free Underground games. Its score was calculated by analyzing a total of 2,530 reviews on Steam. This breaks down to a total of 2,104 positive reviews and 426 negative reviews — making it "Very 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 | 8/27/2020 |
| Franchise | Rejected Games |
| Developer | Rejected Games |
| Publishers | |
| Steam App Id | 1340530 |
7. Drugs and Crime Idle
Behind every great fortune, lies a great crime! Sell drugs, attack with your gang, gamble your CrimeCoins away and hope, that you get that rare item, finally. Free-to-play. Offline Progression. No Microtransactions except 2 optional DLCs.
Drugs and Crime Idle has achieved a Player Score of 65, placing it in the #7 spot for the best free Underground games. Its score was calculated by analyzing a total of 268 reviews on Steam. This breaks down to a total of 185 positive reviews and 83 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 | 12/11/2020 |
| Developers | |
| Publishers | |
| Steam App Id | 1481970 |
8. XBall
A real-time tactics PvP sports game with an underground vibe. Control every player on your team in fast-paced matches that blend basketball, football, and hockey. Customize the action with adjustable time pace and team sizes.
XBall has achieved a Player Score of 71, placing it in the #8 spot for the best free Underground games. Its score was calculated by analyzing a total of 5 reviews on Steam. This breaks down to a total of 5 positive reviews and 0 negative reviews — making it "5 user reviews" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 9/23/2024 |
| Developer | Anton Paramonov |
| Publisher | Anton Paramonov |
| Steam App Id | 2021070 |
9. Costly Adventure
In Costly Adventure, Match-3 gameplay meets the concept of roguelite runs. Party of adventurers is seeking a mighty artifact but they must meet the ever increasing payment demands from the bridge Troll.
Costly Adventure has achieved a Player Score of 74, placing it in the #9 spot for the best free Underground games. Its score was calculated by analyzing a total of 8 reviews on Steam. This breaks down to a total of 8 positive reviews and 0 negative reviews — making it "8 user reviews" 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 | 10/10/2023 |
| Developer | Postperson Studio |
| Publisher | Postperson Studio |
| Steam App Id | 2014480 |
10. DeepWeb Simulator: Prologue
DeepWeb Simulator: Prologue and start your dark trade! Start running your own dark world now. Source, process and sell illegal goods. Expand your inventory and take the restricted step of your dark trade empire.
DeepWeb Simulator: Prologue has achieved a Player Score of 69, placing it in the #10 spot for the best free Underground games. Its score was calculated by analyzing a total of 72 reviews on Steam. This breaks down to a total of 55 positive reviews and 17 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 | 5/27/2024 |
| Developer | Bull Games |
| Publisher | Bull Games |
| Steam App Id | 2965290 |
More Free Underground Games
Explore even more rankings for the 88 best free Underground games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 212 | 2/2/2023 | 69 | Free | Steam Charts | |
| 61 | 4/28/2022 | 59 | Free | Steam Charts | |
| 13 | 7/10/2023 | 90 | Free | Steam Charts | |
| 3 | 5/3/2024 | 69 | Free | Steam Charts | |
| 3 | 6/15/2022 | 47 | Free | Steam Charts | |
| 3 | 8/27/2020 | 80 | Free | Steam Charts | |
| 2 | 12/11/2020 | 65 | Free | Steam Charts | |
| 2 | 9/23/2024 | 71 | Free | Steam Charts | |
| 2 | 10/10/2023 | 74 | Free | Steam Charts | |
| 2 | 5/27/2024 | 69 | Free | Steam Charts | |
 | 2 | 7/15/2022 | 63 | Free | Steam Charts | |
 | 1 | 8/14/2022 | 65 | Free | Steam Charts | |
 | 1 | 4/20/2023 | 74 | Free | Steam Charts | |
 | 1 | 2/15/2021 | 64 | Free | Steam Charts | |
 | 1 | 8/14/2021 | 63 | Free | Steam Charts | |
 | 1 | 4/5/2023 | 72 | Free | Steam Charts | |
 | 1 | 4/29/2019 | 89 | Free | Steam Charts | |
 | 1 | 2/14/2024 | 65 | Free | Steam Charts | |
 | 1 | 9/22/2023 | 61 | Free | Steam Charts | |
 | 1 | 6/1/2023 | 54 | 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, February 13). Steam Store. Steam Store.
- Valve Corporation. (2025, February 13). Underworld Idle on Steam. Steam Store.
- Valve Corporation. (2025, February 12). Otherworld Legends 战魂铭人 on Steam. Steam Store.
- Valve Corporation. (2025, January 27). Cave Crawlers on Steam. Steam Store.
- Valve Corporation. (2024, December 7). Molementum on Steam. Steam Store.
- Valve Corporation. (2024, October 29). 魔能纪元 on Steam. Steam Store.
- Valve Corporation. (2025, January 9). Mr. Prepper: Prologue on Steam. Steam Store.
- Valve Corporation. (2025, January 20). Drugs and Crime Idle on Steam. Steam Store.
- Valve Corporation. (2024, September 23). XBall on Steam. Steam Store.
- Valve Corporation. (2025, February 13). Costly Adventure on Steam. Steam Store.
- Valve Corporation. (2025, January 26). DeepWeb Simulator: Prologue on Steam. Steam Store.