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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

System requirements

Minimum:

    Minimum:
    • OS *: Windows 7 / 8 / 10 / 11
    • 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:

    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
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FAQ

8 questions

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

Q Can I play CastleOn on Steam Deck?

No, not right now. Valve marks CastleOn as Steam Deck Unsupported, so it won't launch via Proton at this time. Keep an eye on XD.deals - we track Proton breakthroughs and community fixes, and we'll flag it the moment there's a working way to play CastleOn on Steam Deck.

Yes. A CastleOn Steam version exists. Pick any offer tagged Steam Key on XD.deals, redeem it in the desktop client, and play CastleOn on Steam PC.

Yes. Once your Steam key is redeemed, you can launch CastleOn in Offline Mode via Steam. Your save files will sync the next time you go online.

Yes, you can buy a CastleOn Steam Key directly on the Steam Store. At XD.deals, we aggregate all available Steam DRM offers so you can compare cheap CastleOn steam deals in one place.

At the moment we don't have any live offers for CastleOn - both official stores ({1}) and keyshops ({2}) show the game as sold out or temporarily unavailable…

With XD.deals, PC gamers can instantly see where to buy a cheap CastleOn PC Steam key. Our real-time price-comparison engine and curated coupon database track every official store and trusted keyshop so you dont have to. Right now we detect this game in {1} live offers from stores and keyshops.

Not yet. There's no CastleOn Steam listing right now, so you can't buy CastleOn on Steam today. Instead, browse the other CastleOn offers on XD.deals - official stores and keyshops often provide DRM-free or launcher-key versions you can play while waiting for a future Steam release.

No - XD.deals itself isn't a store. We're a price-comparison service that tracks the best offers for CastleOn across official stores and verified keyshops. Click "Shop Now" next to the deal you want, and you'll be redirected to the retailer's website to complete your purchase and receive the key there.

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