Free Underground Games on Steam
Steam currently has 559 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 4/6/2024.
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 1,001 reviews on Steam. This breaks down to a total of 718 positive reviews and 283 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. 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 89, placing it in the #2 spot for the best free Underground games. Its score was calculated by analyzing a total of 1,831 reviews on Steam. This breaks down to a total of 1,720 positive reviews and 111 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 |
3. 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 #3 spot for the best free Underground games. Its score was calculated by analyzing a total of 2,483 reviews on Steam. This breaks down to a total of 2,068 positive reviews and 415 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 |
4. 魔能纪元
An IDLE role-playing game
魔能纪元 has achieved a Player Score of 43, placing it in the #4 spot for the best free Underground games. Its score was calculated by analyzing a total of 55 reviews on Steam. This breaks down to a total of 22 positive reviews and 33 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 |
5. CONCLUSE
Concluse is an atmospheric horror game which features puzzles, outstanding cutscenes, and something a little twisted..
CONCLUSE has achieved a Player Score of 71, placing it in the #5 spot for the best free Underground games. Its score was calculated by analyzing a total of 465 reviews on Steam. This breaks down to a total of 351 positive reviews and 114 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play CONCLUSE on the Steam Deck (though some functionality may be limited).
| Release Date | 6/29/2018 |
| Developers | |
| Publishers | |
| Steam App Id | 826230 |
6. 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 66, placing it in the #6 spot for the best free Underground games. Its score was calculated by analyzing a total of 252 reviews on Steam. This breaks down to a total of 177 positive reviews and 75 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 | 12/11/2020 |
| Developers | |
| Publishers | |
| Steam App Id | 1481970 |
7. Hexagon Knockout
Hexagon Knockout is a multiplayer bumper car game where the objective is to knock out your opponents. You control a vehicle capable of firing rockets using its cannon at the rear. Play all the different game modes, offline as well as online.
Hexagon Knockout has achieved a Player Score of 79, placing it in the #7 spot for the best free Underground games. Its score was calculated by analyzing a total of 134 reviews on Steam. This breaks down to a total of 117 positive reviews and 17 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.
8. 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 76, placing it in the #8 spot for the best free Underground games. Its score was calculated by analyzing a total of 11 reviews on Steam. This breaks down to a total of 11 positive reviews and 0 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 | 5/3/2024 |
| Developer | Plushie Bomb Studios |
| Publisher | Plushie Bomb Studios |
| Steam App Id | 2841830 |
9. 所向之未来 - Towards Future
从朝阳无法照射到的黑暗中醒来，他的记忆，停留在小主人小心翼翼地将他抱回家的那一幕。基地已然破败不堪，这里也没有任何人活着的气息。小主人究竟去了哪里，末日之下，究竟是否还存在希望……
所向之未来 - Towards Future has achieved a Player Score of 92, placing it in the #9 spot for the best free Underground games. Its score was calculated by analyzing a total of 635 reviews on Steam. This breaks down to a total of 627 positive reviews and 8 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play 所向之未来 - Towards Future on the Steam Deck (though some functionality may be limited).
| Release Date | 2/18/2022 |
| Developer | 拾伍司工坊 |
| Publisher | Eternal Dream |
| Steam App Id | 1888010 |
10. Rainbowcore Hypernova
Unleash your inner fighter in Rainbowcore Hypernova, the explosively fun and free fighting game featuring vibrant characters, easy controls, and dynamic battles
Rainbowcore Hypernova has achieved a Player Score of 73, placing it in the #10 spot for the best free Underground games. Its score was calculated by analyzing a total of 143 reviews on Steam. This breaks down to a total of 114 positive reviews and 29 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 Rainbowcore Hypernova on the Steam Deck (though some functionality may be limited).
| Release Date | 4/20/2023 |
| Developer | Nucko Games |
| Publisher | Nucko Games |
| Steam App Id | 2346510 |
More Free Underground Games
Explore even more rankings for the 67 best free Underground games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
 | 220 | 2/2/2023 | 69 | Free | Steam Charts | |
 | 107 | 7/10/2023 | 89 | Free | Steam Charts | |
 | 6 | 8/27/2020 | 80 | Free | Steam Charts | |
 | 3 | 6/15/2022 | 43 | Free | Steam Charts | |
 | 3 | 6/29/2018 | 71 | Free | Steam Charts | |
 | 3 | 12/11/2020 | 66 | Free | Steam Charts | |
 | 3 | 8/31/2021 | 79 | Free | Steam Charts | |
 | 3 | 5/3/2024 | 76 | Free | Steam Charts | |
 | 2 | 2/18/2022 | 92 | Free | Steam Charts | |
 | 1 | 4/20/2023 | 73 | Free | Steam Charts | |
 | 1 | 9/22/2023 | 64 | Free | Steam Charts | |
 | 1 | 11/14/2017 | 50 | Free | Steam Charts | |
 | 1 | 2/29/2024 | 78 | Free | Steam Charts | |
 | 1 | 9/1/2020 | 81 | Free | Steam Charts | |
 | 1 | 1/14/2021 | 67 | Free | Steam Charts | |
 | 1 | 8/2/2023 | 63 | Free | Steam Charts | |
 | 1 | 1/28/2021 | 81 | Free | Steam Charts | |
 | 1 | 2/14/2024 | 64 | Free | Steam Charts | |
 | 1 | 12/17/2021 | 68 | Free | Steam Charts | |
 | 1 | 10/31/2022 | 68 | 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. (2024, April 6). Steam Store. Steam Store.
- Valve Corporation. (2024, April 6). Underworld Idle on Steam. Steam Store.
- Valve Corporation. (2024, May 16). Cave Crawlers on Steam. Steam Store.
- Valve Corporation. (2024, March 20). Mr. Prepper: Prologue on Steam. Steam Store.
- Valve Corporation. (2024, April 17). 魔能纪元 on Steam. Steam Store.
- Valve Corporation. (2024, February 28). CONCLUSE on Steam. Steam Store.
- Valve Corporation. (2024, May 17). Drugs and Crime Idle on Steam. Steam Store.
- Valve Corporation. (2024, April 3). Hexagon Knockout on Steam. Steam Store.
- Valve Corporation. (2024, May 18). Molementum on Steam. Steam Store.
- Valve Corporation. (2024, May 12). 所向之未来 - Towards Future on Steam. Steam Store.
- Valve Corporation. (2024, May 5). Rainbowcore Hypernova on Steam. Steam Store.