Free Diplomacy Games on Steam
Steam currently has 347 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 3/7/2024.
Looking for more? Explore other lists such as:
- Best diplomacy games on Steam
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- Free Steam games
- Most played Steam games
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1. 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 holds the #1 spot for "best free Diplomacy game on Steam" with a Player Score of 89. Its score was calculated by analyzing a total of 71,206 reviews on Steam. This breaks down to a total of 64,504 positive reviews and 6,702 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 | Paradox Development Studio |
| Developer | Paradox Development Studio |
| Publisher | Paradox Interactive |
| Steam App Id | 203770 |
2. 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 59, placing it in the #2 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 2,317 reviews on Steam. This breaks down to a total of 1,399 positive reviews and 918 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 |
3. 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 76, placing it in the #3 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 4,438 reviews on Steam. This breaks down to a total of 3,454 positive reviews and 984 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 |
4. 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 #4 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 3,299 reviews on Steam. This breaks down to a total of 2,470 positive reviews and 829 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 |
5. 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 #5 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 5,094 reviews on Steam. This breaks down to a total of 3,625 positive reviews and 1,469 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 |
6. 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 #6 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 1,425 reviews on Steam. This breaks down to a total of 1,209 positive reviews and 216 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 |
7. 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 #7 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 233 reviews on Steam. This breaks down to a total of 106 positive reviews and 127 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 |
8. Star Sonata 2
Star Sonata 2 is a space sandbox MMO that combines elements of action, RPG, and empire creation into a truly unique MMO. Explore the sandbox style universe, build persistent bases, construct trade ships, and even fight your way to the top and claim the Emperor’s Throne!
Star Sonata 2 has achieved a Player Score of 62, placing it in the #8 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 242 reviews on Steam. This breaks down to a total of 157 positive reviews and 85 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Star Sonata 2 on the Steam Deck (though some functionality may be limited).
| Release Date | 6/12/2020 |
| Developer | Landauer Games |
| Publisher | Landauer Games |
| Steam App Id | 304690 |
9. The Last Sovereign
The Last Sovereign is an adult fantasy RPG that twists your expectations for adult games, while fully embracing a reconstruction of some familiar old tropes to provide a lot of fun, sexy content.
The Last Sovereign has achieved a Player Score of 89, placing it in the #9 spot for the best free Diplomacy games. Its score was calculated by analyzing a total of 560 reviews on Steam. This breaks down to a total of 536 positive reviews and 24 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 2/15/2019 |
| Developer | Sierra Lee |
| Publisher | Sierra Lee |
| Steam App Id | 951830 |
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 558 reviews on Steam. This breaks down to a total of 485 positive reviews and 73 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 42 best free Diplomacy games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
 | 2,168 | 2/14/2012 | 89 | Free | Steam Charts | |
 | 616 | 11/14/2019 | 59 | Free | Steam Charts | |
 | 583 | 3/15/2018 | 76 | Free | Steam Charts | |
 | 396 | 7/16/2019 | 73 | Free | Steam Charts | |
 | 339 | 10/21/2017 | 70 | Free | Steam Charts | |
 | 193 | 8/1/2022 | 81 | Free | Steam Charts | |
 | 128 | 9/18/2023 | 46 | Free | Steam Charts | |
 | 46 | 6/12/2020 | 62 | Free | Steam Charts | |
 | 38 | 2/15/2019 | 89 | Free | Steam Charts | |
 | 27 | 5/4/2021 | 81 | Free | Steam Charts | |
 | 20 | 4/17/2024 | 60 | Free | Steam Charts | |
 | 9 | 2/24/2024 | 85 | Free | Steam Charts | |
 | 8 | 1/11/2017 | 63 | Free | Steam Charts | |
 | 8 | 7/19/2022 | 80 | Free | Steam Charts | |
 | 8 | 1/10/2024 | 81 | Free | Steam Charts | |
 | 7 | 2/24/2023 | 51 | Free | Steam Charts | |
 | 6 | 6/2/2022 | 74 | Free | Steam Charts | |
 | 4 | 5/10/2022 | 64 | Free | Steam Charts | |
 | 3 | 10/6/2023 | 78 | Free | Steam Charts | |
 | 3 | 12/10/2015 | 62 | $9.99 | 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, March 7). Steam Store. Steam Store.
- Valve Corporation. (2024, March 7). Crusader Kings II on Steam. Steam Store.
- Valve Corporation. (2024, May 16). Game of Thrones Winter is Coming on Steam. Steam Store.
- Valve Corporation. (2024, May 18). Conflict of Nations: World War 3 on Steam. Steam Store.
- Valve Corporation. (2024, May 5). Supremacy 1914: World War 1 on Steam. Steam Store.
- Valve Corporation. (2024, May 7). Call of War: World War 2 on Steam. Steam Store.
- Valve Corporation. (2024, April 22). Idle Research on Steam. Steam Store.
- Valve Corporation. (2024, May 12). Shipping Manager on Steam. Steam Store.
- Valve Corporation. (2024, May 11). Star Sonata 2 on Steam. Steam Store.
- Valve Corporation. (2024, April 1). The Last Sovereign on Steam. Steam Store.
- Valve Corporation. (2024, May 4). X3: Farnham's Legacy on Steam. Steam Store.