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CastleOn

Build a castle! Grow economy, recruit troops from Europe and the Holy Land, man the walls and towers! Place traps and defeat attackers with arrows, wood and stone, fire, disease and cold steel! Survive the Third Crusade and conquer enemy lands in Castleon!

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Updated: Jul 14, 2026Developer scaleThe operating scale of the game's developer.
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About the Game

Welcome to CastleOn!

Castleon is a turn-based castle builder strategy game. Your goal is to either survive for a certain amount of turns, or conquer all the enemy Lords.

Build walls and towers of wood and stone! Put traps and snares, dig moats, raise mottes. Construct an impenetrable fortress that will stand the test of time!

Man the walls! Unleash arrows, bolts, rolling logs, boiling oil pots, pitch and rotten carcasses upon thine enemies! Make them eat cold steel! Destroy their catapults and battering rams! Push back ladders! Dismantle their siege towers! Survive the Third Crusade!

With a massive tech tree, 5 different religions, many different types of policies, 16 criminal abilities, randomized lord relations, random events, and 6 difficulty levels, no two matches will be identical in Castleon! Position of your castle is not predetermined on maps and you get to pick and customize every aspect of your kingdom! 

Features:

  • Over 70 different buildings, walls, towers and traps

  • Over 30 different units - from the basic Spearmen and Archers to the powerful Templar and Teutonic Knights, hasty Horse Archers, elusive Assassins, mighty Varangian Guards.

  • Manage diplomacy with over 50 different historical Lords who reigned in the second half of 12th century - Richard the Lionheart, Saladin, Henry VI, Baldwin the Leper King, Isaac II Angelos, Stefan Nemanja, Kulin Ban, Knut Eriksson, all the Alfonsos and Sanchos of Iberian Peninsula, and many more!

  • Research over 90 different technologies, all of which change the way certain buildings or units function.

  • Choose between 5 different religions, each offering 10 special passive bonuses based on the level of your peasants' faith. If you prefer not to mix religion and games, not to worry - they are optional and can be disabled and enabled in the menu.

  • Use criminal abilities to gain bonuses at the cost of corruption! Corrupt court will reduce the effectiveness of your buildings and resource gathering, so use criminal abilities wisely!

  • Fight in the Holy Land, Balkans, Iberian Peninsula, Scandinavia and central Europe! Survive on over 50 different Skirmish maps set on the locations of worlds famous castles, as well as multiple full historical campaigns featuring real battles and custom win and lose conditions.

  • Create your own maps in Editor, be it skirmish or custom campaigns!