Free games like The Castle Doctrine
Below are 11 free-to-play Steam games similar to The Castle Doctrine, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like The Castle Doctrine page.
Ranked picks
- 1
Helltaker
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
Helltaker is a short game about sharply dressed demon girls.
- 2
Ultimate Custom Night
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 3
Bongo Cat
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie and Massively Multiplayer with The Castle Doctrine.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
- 4
Steam Engine Simulator
Free-to-play alternative to The Castle Doctrine — no purchase or trial window.
The Steam Engine Simulator shown on AngeTheGreat's YouTube channel.
- 5
Magic Archery
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.
- 6
Coloring Pixels
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
A relaxing coloring by numbers game. Enjoy completing a variety of images with differing themes, complexity, and sizes.
- 7
Eternal Senia
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
Thoughts and expectations ARPG
- 8
There Is No Game: Jam Edition 2015
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie with The Castle Doctrine.
A little game that’s not a game, winner of an old game jam that nobody’s ever heard of. So DON'T INSTALL IT!
- 9
Realm of the Mad God Exalt
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie and Massively Multiplayer with The Castle Doctrine.
Embark on an exhilarating journey into the pixelated Realm of the Mad God! Join, an action-packed, free-to-play MMO bullet hell game. Discover a world with danger, challenges, and hidden treasures as you battle through waves of enemies. Team up with players and conquer dungeons to become a legend!
- 10
Pixel Starships
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Strategy and Indie with The Castle Doctrine.
Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven.
- 11
StarBreak
Free-to-play alternative to The Castle Doctrine — no purchase or trial window. Shares Indie and Massively Multiplayer with The Castle Doctrine.
StarBreak is a unique skill-based action platformer MMO where you explore strange sci-fi worlds alongside dozens of other players, kill legions of dangerous aliens and fight epic boss battles.