Single-player games like Diplomacy is Not an Option
Below are 19 single-player Steam games similar to Diplomacy is Not an Option, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Diplomacy is Not an Option page.
Ranked picks
- 1
Age of Empires IV: Anniversary Edition
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy with Diplomacy is Not an Option.
Celebrating its first year of delighting millions of global players, the award-winning and best-selling strategy franchise continues with Age of Empires IV: Anniversary Edition, putting you at the center of even more epic historical battles that shaped the world.
- 2
Age of Empires® III (2007)
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Microsoft Studios brings you three epic Age of Empires III games in one monumental collection for the first time.
- 3
Cossacks 3
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Action and Strategy with Diplomacy is Not an Option.
Cossacks 3 is the return of RTS classics. Obtain resources, build cities and research technologies while taking command of great armies, crushing enemies in grand historical warfares on land and sea!
- 4
Farthest Frontier
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Indie with Diplomacy is Not an Option.
Protect and guide your people as you forge a town from untamed wilderness at the edge of the known world. Harvest raw materials, hunt, fish and farm to survive. Produce crafted items to trade, consume, equip and fight with as you battle for your survival against the elements and outside threats.
- 5
Door Kickers 2: Task Force North
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Action and Strategy with Diplomacy is Not an Option.
Command military Special Ops Teams in gripping tactical combat against a Middle East-based terrorist network. Sequel to RockPaperShotgun's "Best Tactics Game of 2014".
- 6
From Glory To Goo
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
From Glory To Goo is a Sci-Fi survival RTS set on an alien world. Serve as humanity's bulwark by establishing a colony and supporting your colonists still in orbit. But beware, for The Goo, a relentless and shape-shifting force approaches from all sides, even above and below.
- 7
Becastled
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Indie with Diplomacy is Not an Option.
Build a castle by day and defend it by night. Becastled blends cozy city-building with challenging tower defense strategy. Lead the Sun Kingdom’s last stand against the Moon Beasts and end the ancient conflict between light and darkness!
- 8
Hearts of Iron IV
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Victory is at your fingertips! Your ability to lead your nation is your supreme weapon, the strategy game Hearts of Iron IV lets you take command of any nation in World War II; the most engaging conflict in world history.
- 9
Age of Darkness: Final Stand
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy with Diplomacy is Not an Option.
Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.
- 10
Majesty 2
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
In the world of Majesty, you are the ruler of the kingdom Ardania. At your service are your loyal and somewhat obnoxious subordinates, who have their own minds about how things should be done. In fact, Majesty is the only game where your heroes decide on their own what should be done and when, leaving you to try to control them through...
- 11
They Are Billions
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy with Diplomacy is Not an Option.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
- 12
Stronghold: Definitive Edition
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Greetings sire! Your stronghold awaits you. Build a castle economy, besiege unforgettable villains and return to the 'castle sim' that started it all. Experience this classic RTS with upgraded visuals, modernised gameplay, Steam multiplayer and a new campaign.
- 13
Cataclismo
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Design and build fortresses brick by brick to stand against endless hordes of Horrors in this real-time strategy game with resource management, siege defense, and exploration. Lead from the ramparts, push back the darkness, and hold fast against the creatures of the Mist.
- 14
Thronefall
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Action and Strategy with Diplomacy is Not an Option.
A minimalist game about building and defending your little kingdom.
- 15
The Riftbreaker
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Action and Strategy with Diplomacy is Not an Option.
The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.
- 16
URBO
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Indie and Casual with Diplomacy is Not an Option.
URBO is a relaxing cozy city-building puzzle game where you create beautiful towns on floating islands. Begin with an empty grid of landscape, choose an architectural style and build. Watch the population grow and the city flourish.
- 17
Abra-Cooking-Dabra
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Abra-Cooking-Dabra is a cooking card game. Manage ingredients and make British dishes to keep toves, borogoves, and mome raths fed. Meet timers and fulfill puzzling orders despite the angry wacky Cat being your boss. You are Wonderland's new chef.
- 18
URBO: Dream One
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Indie with Diplomacy is Not an Option.
URBO: Dream One is a meditative puzzle game where you build houses around the mysterious Tower. Let your mind wander through visions of an enchanted city on an island in the middle of the crystal clear waters of a vibrant lake.
- 19
Diplomacy is Not an Option: Shareware
Single-player alternative to Diplomacy is Not an Option — playable solo, no multiplayer required. Shares Strategy and Simulation with Diplomacy is Not an Option.
Diplomacy is Not an Option: Shareware is a free prequel to the original game. In a medieval fantasy world, you are to build settlements, raise huge armies, and defend against massive hordes of enemies. Learn how Ironbrow clan shaped the world's map the first time - if you survive, that is.