Single-player games like Castra
Below are 12 single-player Steam games similar to Castra, 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 Castra page.
Ranked picks
- 1
Corsair Cove
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Simulation with Castra.
Build a sprawling pirate haven, raise a fleet to explore the high seas, and take on the Crown to keep the Age of Piracy alive! From ale to flintlock pistols, and from scallywags to swashbucklers, you’ll need to manage complex production chains and govern a rowdy crew to reign supreme over the seas!
- 2
Cataclismo
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Simulation with Castra.
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.
- 3
Driftland: The Magic Revival
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
After a devastating war between ancient mages, a powerful spell is all that holds together the shattered planet of Driftland. Take on the role of a powerful mage capable of moving and connecting floating lands, develop a mighty empire, and restore Driftland to its former glory!
- 4
Stronghold HD (2012)
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Simulation with Castra.
The original castle sim, Stronghold HD allows you to design, build and destroy historical castles. Engage in medieval warfare against the AI in one of two single player campaigns or online with up to 8 players.
- 5
Foundation
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
Foundation is a grid-less, laidback medieval city-building game with a focus on organic development, monument construction and resource management.
- 6
Workers & Resources: Soviet Republic
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Simulation with Castra.
Build a soviet republic from an impoverished country into a rich industrial superpower in a city builder with intricate production chains and a fully simulated global economy. Manage the lives of your citizens from education to work and party loyalty to criminal activity.
- 7
Northgard: Definitive Edition
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
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!
- 8
Banished
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
In this city-building strategy game, you control a group of exiled travelers who decide to restart their lives in a new land. They have only the clothes on their backs and a cart filled with supplies from their homeland. The townspeople of Banished are your primary resource.
- 9
Deducto 2
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
A fun sus-like game where you backstab your co-workers and get mad at your co-workers for backstabbing you. (up to 16 players)
- 10
Buy Low Sell High
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
Buy Low Sell High is a stock market game made to be easy to learn, fast-paced, and fun. The goal is to make as much money as you can starting with just $5,000. Good luck, have fun!
- 11
Wall Street Tycoon
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy and Indie with Castra.
Wall Street Tycoon is a business simulation game where you’re the CEO of a new investment company. Your job is to grow the company, hire employees, and manage the business!
- 12
High Stakes Chess
Single-player alternative to Castra — playable solo, no multiplayer required. Shares Strategy with Castra.
A fusion of poker and chess where cards determine the pieces you bring into battle. Bet on each hand, place your pieces, then fight it out on the chessboard.