Free Diplomacy Games on Steam
Steam currently has 441 Diplomacy 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 Diplomacy game rankings were last updated on 2/12/2025.
Looking for more? Explore other lists such as:
- Best diplomacy games on Steam
- Best diplomacy Steam Deck games
- Best diplomacy Steam games for Mac OS
- Best diplomacy Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. Royal Quest Online
Fantasy comes alive in this vast yet cozy free-to-play MMORPG! Choose between 4 classes and 8 subclasses, explore hundreds of locations, thousands of quests, dive into varied PvE and PvP modes, enter the unique vibrant world, and trade with other players. Play, explore, fight and be victorious!
Royal Quest Online holds the #1 spot for "best free Diplomacy game on Steam" with a Player Score of 78. Its score was calculated by analyzing a total of 2,367 reviews on Steam. This breaks down to a total of 1,924 positive reviews and 443 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 | 12/19/2024 |
| Developers | |
| Publishers | |
| Steam App Id | 2962300 |
2. Crusader Kings II
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
Crusader Kings II has achieved a Player Score of 89, placing it in the #2 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 72,385 reviews on Steam. This breaks down to a total of 65,563 positive reviews and 6,822 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Crusader Kings II on the Steam Deck (though some functionality may be limited).
| Release Date | 2/14/2012 |
| Franchise | Crusader Kings Official |
| Developer | Paradox Development Studio |
| Publisher | Paradox Interactive |
| Steam App Id | 203770 |
3. Game of Thrones Winter is Coming
Game of Thrones Winter is Coming is a PC strategy game based on the HBO drama television series, officially licensed by Warner Bros. Interactive Entertainment under HBO, and developed and published by YOOZOO Games. Interactive Entertainment and HBO.
Game of Thrones Winter is Coming has achieved a Player Score of 60, placing it in the #3 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 2,535 reviews on Steam. This breaks down to a total of 1,535 positive reviews and 1,000 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Game of Thrones Winter is Coming on the Steam Deck (though some functionality may be limited).
| Release Date | 11/14/2019 |
| Developer | YOUZU (SINGAPORE) PTE. LTD. |
| Publisher | YOUZU (SINGAPORE) PTE. LTD. |
| Steam App Id | 1105420 |
4. Conflict of Nations: World War 3
This Long Term Strategy Game lets you take control of the armed forces of your nation. Become responsible for its military expansion, technological research and economic development. Form alliances and wage total war for global dominance on the battlefields of World War 3.
Conflict of Nations: World War 3 has achieved a Player Score of 75, placing it in the #4 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 4,966 reviews on Steam. This breaks down to a total of 3,851 positive reviews and 1,115 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 not possible to play or run Conflict of Nations: World War 3 on the Steam Deck.
| Release Date | 3/15/2018 |
| Developer | Dorado Games |
| Publisher | Dorado Games |
| Steam App Id | 784950 |
5. Supremacy 1914: World War 1
Take over the control of one of the mighty nations during the times of World War 1 in the biggest WW1 strategy game of all time. Conquer provinces, forge alliances and build up your economy in real-time on persistent maps. Build experimental weapons of World War 1 and become the one true superpower!
Supremacy 1914: World War 1 has achieved a Player Score of 73, placing it in the #5 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 3,716 reviews on Steam. This breaks down to a total of 2,791 positive reviews and 925 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 not possible to play or run Supremacy 1914: World War 1 on the Steam Deck.
| Release Date | 7/16/2019 |
| Developer | Bytro Labs GmbH |
| Publisher | Bytro Labs GmbH |
| Steam App Id | 979920 |
6. Call of War: World War 2
Take over the control of one of the mighty nations during the times of World War 2 in this persisting long-term strategy game. Conquer provinces, forge alliances and build up your economy in real-time. Research top secret weapons of World War 2 and become the one true superpower!
Call of War: World War 2 has achieved a Player Score of 70, placing it in the #6 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 5,610 reviews on Steam. This breaks down to a total of 4,004 positive reviews and 1,606 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 Call of War: World War 2 on the Steam Deck (though some functionality may be limited).
| Release Date | 10/21/2017 |
| Developer | Bytro Labs GmbH |
| Publisher | Bytro Labs GmbH |
| Steam App Id | 672680 |
7. Idle Research
Idle Research is an addictive, resource management, incremental game with both idle and active playstyles. Research and craft colorful Flasks and Tubes to earn as much Energy as possible! Big numbers guaranteed.
Idle Research has achieved a Player Score of 81, placing it in the #7 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 1,626 reviews on Steam. This breaks down to a total of 1,386 positive reviews and 240 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Idle Research on the Steam Deck (though some functionality may be limited).
| Release Date | 8/1/2022 |
| Developer | Considera Games LLC |
| Publisher | Considera Core LLC |
| Steam App Id | 1482860 |
8. Project Entropy
Welcome, commander, to Project Entropy- an ultimate Sci-Fi and role-playing game with battles in space. In this immersive MMO experience, you will command alien civilizations, conquer uncharted planets, and build Hero fleets.
Project Entropy has achieved a Player Score of 54, placing it in the #8 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 75 reviews on Steam. This breaks down to a total of 42 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 | 4/17/2024 |
| Developer | FunPlus International AG |
| Publisher | FunPlus International AG |
| Steam App Id | 2806410 |
9. Shipping Manager
Create and manage your own shipping empire. Control every aspect from route creation to marketing to staff handling and beat other managers to top the leaderboards.
Shipping Manager has achieved a Player Score of 46, placing it in the #9 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 375 reviews on Steam. This breaks down to a total of 169 positive reviews and 206 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Shipping Manager on the Steam Deck (though some functionality may be limited).
| Release Date | 9/18/2023 |
| Developer | Trophy Games |
| Publisher | Trophy Games |
| Steam App Id | 2445660 |
10. X3: Farnham's Legacy
X3: Farnham's Legacy is a new game in the X3 space game series. TRADE, FIGHT, BUILD, THINK in a living and breathing universe, which incorporates a new storyline and yet more additions to the open, free-form gameplay that forms the core of all X series games.
X3: Farnham's Legacy has achieved a Player Score of 81, placing it in the #10 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 588 reviews on Steam. This breaks down to a total of 509 positive reviews and 79 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
More Free Diplomacy Games
Explore even more rankings for the 49 best free Diplomacy games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 1,183 | 12/19/2024 | 78 | Free | Steam Charts | |
| 956 | 2/14/2012 | 89 | Free | Steam Charts | |
| 492 | 11/14/2019 | 60 | Free | Steam Charts | |
| 450 | 3/15/2018 | 75 | Free | Steam Charts | |
| 232 | 7/16/2019 | 73 | Free | Steam Charts | |
| 212 | 10/21/2017 | 70 | Free | Steam Charts | |
| 140 | 8/1/2022 | 81 | Free | Steam Charts | |
| 130 | 4/17/2024 | 54 | Free | Steam Charts | |
| 97 | 9/18/2023 | 46 | Free | Steam Charts | |
| 37 | 5/4/2021 | 81 | Free | Steam Charts | |
 | 26 | 2/15/2019 | 89 | Free | Steam Charts | |
 | 21 | 4/4/2024 | 62 | Free | Steam Charts | |
 | 13 | 6/12/2020 | 64 | Free | Steam Charts | |
 | 11 | 1/11/2017 | 65 | Free | Steam Charts | |
 | 7 | 12/10/2015 | 63 | $9.99 | Steam Charts | |
 | 6 | 11/21/2024 | 70 | Free | Steam Charts | |
 | 6 | 1/14/2025 | 78 | Free | Steam Charts | |
 | 5 | 1/10/2024 | 74 | Free | Steam Charts | |
 | 3 | 7/19/2022 | 79 | Free | Steam Charts | |
 | 2 | 2/24/2024 | 79 | 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 12). Steam Store. Steam Store.
- Valve Corporation. (2025, February 12). Royal Quest Online on Steam. Steam Store.
- Valve Corporation. (2025, January 22). Crusader Kings II on Steam. Steam Store.
- Valve Corporation. (2025, February 13). Game of Thrones Winter is Coming on Steam. Steam Store.
- Valve Corporation. (2025, January 25). Conflict of Nations: World War 3 on Steam. Steam Store.
- Valve Corporation. (2025, January 20). Supremacy 1914: World War 1 on Steam. Steam Store.
- Valve Corporation. (2025, February 3). Call of War: World War 2 on Steam. Steam Store.
- Valve Corporation. (2024, December 21). Idle Research on Steam. Steam Store.
- Valve Corporation. (2025, February 10). Project Entropy on Steam. Steam Store.
- Valve Corporation. (2025, February 4). Shipping Manager on Steam. Steam Store.
- Valve Corporation. (2025, January 22). X3: Farnham's Legacy on Steam. Steam Store.