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Release: 05 Aug 2025
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About CastleOn

CastleOn - 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!

Interface:
English
Audio:
English
Subtitles:
English

Age rating

Unavailable

Minimum:

  • Processor: Intel© Pentium© CPU G4560 @ 3.50GHz × 2
  • Memory: 4 GB RAM
  • Graphics: 1 GB
  • Storage: 500 MB available space

Recommended:

  • Processor: Intel© Pentium© CPU G4560 @ 3.50GHz × 2
  • Memory: 4 GB RAM
  • Graphics: 1 GB
  • Storage: 500 MB available space

Minimum:

  • OS: Linux Mint 20+ or equivalent
  • Processor: Intel© Pentium© CPU G4560 @ 3.50GHz × 2
  • Memory: 4 GB RAM
  • Graphics: 1 GB
  • Storage: 500 MB available space

Recommended:

  • OS: Linux Mint 20+ or equivalent
  • Processor: Intel© Pentium© CPU G4560 @ 3.50GHz × 2
  • Memory: 4 GB RAM
  • Graphics: 1 GB
  • Storage: 500 MB available space
Historical low
Price history from official stores
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FAQ

8 questions

Before you start looking for a cheap CastleOn key, check the essentials. Developed by Lord Castleon. Published by Lord Castleon. PC released date: 05 Aug 2025.

Q

Where to buy a cheap CastleOn Steam key?

CastleOn is free to play! Download it on Steam and start playing instantly.

CastleOn is completely free on Steam. No purchase needed - just download and play. If you are looking for premium DLC or in-game items, check the offers table above.

Our price tracker covers both official retailers and key marketplaces, so you can find CastleOn on sale even outside seasonal promotions. We currently detect 0 active offers from official stores and keyshops. Check the table above, compare against the historical low, and set an alert so you never miss the next price drop.

Based on our data, CastleOn is not currently available on GeForce NOW. You will need to run it locally on your PC. Browse games available on GeForce NOW.

Yes. CastleOn has an official page on the Steam Store, but we currently don't track any third-party offers with Steam DRM. Check back later or set a price alert.

Not at this time. Valve marks CastleOn as Unsupported on Steam Deck. Keep an eye on XD.deals - we track Proton updates and community fixes. Browse games that are Steam Deck Verified or Steam Deck Playable.

CastleOn does not appear to be available on PC Game Pass, EA Play, Ubisoft+ or any other PC subscription service at this time. Your only option is purchasing the game - use XD.deals to find the best price.

No - XD.deals is not a store. We are a price-comparison service that tracks the best CastleOn deals across official stores and verified keyshops. Click "Go to Store" next to any offer and you will be redirected to the retailer's website to complete your purchase.

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