Single-player games like Open The Gates!
Below are 13 single-player Steam games similar to Open The Gates!, 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 Open The Gates! page.
Ranked picks
- 1

Stronghold: Warlords
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Simulation with Open The Gates!.
Besiege Great Khans, Imperial warlords and Shōgun commanders in Stronghold: Warlords, the latest 'castle sim' from Firefly Studios. Command AI warlords across the battlefield as you build a castle economy and new gunpowder-fuelled siege engines!
- 2

Stronghold Crusader HD (2012)
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Simulation with Open The Gates!.
The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.
- 3

Renaissance Kingdom Wars
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
The year is 1510. As wars rage across Europe, Africa, and the Middle East, it is the age of gunpowder and mercenaries - that changed the course of history. You can do it as well, going from a leader of men to the ruler of an empire in this unique mix of RTS and grand strategy.
- 4

Northgard: Definitive Edition
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
Northgard: Definitive Edition is a critically acclaimed real-time strategy game based on Norse mythology. Lead your clan, uncover the secrets of a mysterious newfound continent and defeat your enemies to conquer the Throne!
- 5

Age of Empires® III (2007)
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Simulation with Open The Gates!.
Microsoft Studios brings you three epic Age of Empires III games in one monumental collection for the first time.
- 6

Becastled
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
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!
- 7

Territory: Farming and Warfare
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
From a small village of a dozen people to a small kingdom of thousands of people. Arrange for residents to work, gathering, fishing and hunting, farming and mining, processing and manufacturing. Trade, accumulate supplies, increase your strength, and fight evil forces and monsters.
- 8

Diplomacy is Not an Option
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
Diplomacy is Not an Option is a strategy game set in a medieval fantasy world. Build your town and defenses, raise huge armies and fight against massive hordes of enemies. How long can you survive?
- 9

KINGDOMS
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Indie and Simulation with Open The Gates!.
KINGDOMS is a procedural medieval RPG in a randomly generated open world. The main feature of KINGDOMS is a smart AI system that completely controls NPC behavior. As the player, you can fully interact with this massive world and become any person you want to be.
- 10

Circle Empires
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Indie with Open The Gates!.
Circle Empires is a fresh take on the RTS genre, featuring a fast-paced approach to conquering the world.
- 11

Stronghold: Definitive Edition
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy and Simulation with Open The Gates!.
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.
- 12

Realms of Madness
Single-player alternative to Open The Gates! — playable solo, no multiplayer required. Shares Strategy with Open The Gates!.
Build a medieval fantasy castle, expand it to recruit mythical creatures, and lead them into battle to demolish the enemy stronghold.
- 13

The Great Exhibition
Single-player alternative to Open The Gates! — playable solo, no multiplayer required.
You are the head curator of a museum. Gather ancient artifacts to expand your collection by raiding temples of long-lost civilizations.