DLC Crusader Kings III: All Under Heaven (DLC) (Steam)
N/A
Oct 27th, 2025
3% cashback on this purchase
Description
Claim the Mandate of Heaven
The world of Crusader Kings III is expanding. In All Under Heaven – the game’s fourth Major Expansion – the map extends to Asia to include the rich and storied lands of China, Japan, and Southeast Asia. Lead legendary warrior houses, manage vast empires and navigate intricate power struggles in this vibrant region filled with history, culture and innovation.
Whether you aim to unify Japan under your house, claim the Mandate of Heaven in China, or thrive as a God-King in Southeast Asia, All Under Heaven expands the boundaries of Crusader Kings III on a monumental scale.
Key FeaturesChina: The Mandate of Heaven
Ascend to the highest tier of power with the new Hegemony title, reigning supreme over all empires in the Chinese region.
Navigate the Dynastic Cycle, a living system of stability and chaos. Exploit periods of instability to rise to power and reshape the political landscape.
Explore the Celestial government system, unique to China. Earn Merit through deeds or the Imperial Examinations, gaining favor and influence.
Manage the Imperial Treasury to fund Great Projects, defend against disasters, or expand your influence with statecraft and might.
China: The Mandate of Heaven
Ascend to the highest tier of power with the new Hegemony title, reigning supreme over all empires in the Chinese region.
Navigate the Dynastic Cycle, a living system of stability and chaos. Exploit periods of instability to rise to power and reshape the political landscape.
Explore the Celestial government system, unique to China. Earn Merit through deeds or the Imperial Examinations, gaining favor and influence.
Manage the Imperial Treasury to fund Great Projects, defend against disasters, or expand your influence with statecraft and might.
Japan: Rise of the Shogunate
Take control of a Japanese House and forge your destiny. Rise through the intricate courtly system to become a mighty Shogun or Kampaku regent.
Strengthen your position through alliances, intrigue, and ritual, or unite the Houses through the strength of your samurai armies; which path you take is for you to decide.
Lead the Imperial Yamato House to restore power to the Emperor, ushering in an age of imperial grandeur.
Experience the rich cultural traditions of Japan, where honor and scandal intertwine, shaping the lives of lords and vassals alike.
Southeast Asia: God-Kings and Temple Empires
Rule as a Devaraja with the Mandala Government, uniting tributaries into vast, temple-centered empires.
Choose what type of deity you want to be by selecting a Devaraja Aspect that grows in strength if you live up to its promise.
Pay tribute to the God King by performing Tributary Missions as a Tributary ruler, increasing favor with your subjects. Or become a God King yourself!
Explore the Silk Road, new Bookmarks and Flavor
Thrive along the expansive Silk Road, as wealth and innovation trace their way across a continent.
New historical starting bookmarks bring fresh perspectives and historical challenges. Play as iconic characters from the past or forge your unique path.
Immerse yourself in Asia's cultural, artistic, and historical nuances with new throne rooms, events, and traditions.
Buy Crusader Kings III Steam Key
Buy Crusader Kings III Steam Key and build your medieval dynasty in Paradox Interactive’s grand strategy RPG on PC through Steam. This is a digital Steam key with instant delivery, so your key will be available in your account dashboard immediately after purchase, ready to activate through the Steam client. Every purchase includes 3% cashback in GB Coins and 24/7 live chat support, backed by over 19,037 verified Trustpilot reviews. From deep strategy games to PC classics, GameBoost offers Steam key catalogue options across the full range of PC gaming.
About Crusader Kings III
Crusader Kings III is a grand strategy role-playing game developed by Paradox Development Studio and published by Paradox Interactive. Instead of controlling only a country, you control a dynasty. Your rulers grow old, gain traits, form relationships, make enemies, marry for alliances, raise heirs, and eventually pass their legacy to the next generation.
The game takes place across the medieval world, where politics, religion, war, family, and personal ambition all collide. You can start as a small count and slowly rise into a powerful king, or begin as an emperor and try to keep a massive realm from collapsing under pressure. Every decision has long-term consequences, from who you marry to how you educate your children, which vassals you trust, and how far you push your claims.
Crusader Kings III gives players many ways to succeed. You can expand through military conquest, create alliances through marriage, manipulate rivals through schemes, reform religion, manage succession laws, or build a wealthy and stable domain. The role-playing layer makes each campaign feel personal, since your ruler’s personality traits often shape what choices are wise, risky, or even possible.
The game is especially appealing if you enjoy strategy games with deep storytelling. One campaign can become a tale of betrayal, holy wars, family feuds, suspicious heirs, disastrous marriages, and unexpected victories. Crusader Kings III is not just about painting the map. It is about keeping your bloodline alive and turning messy medieval chaos into a dynasty worth remembering.
Region & Activation
This game key is available in multiple regions. Select your region at checkout to see availability and pricing for your country. If you are unsure whether your country is supported, check the activation details on the product page before purchasing.
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System Requirements
Minimum
- Requires a 64-bit processor and operating system
- OS
- Windows® 10 Home 64 bit
- Processor
- Intel Core i5-750 | AMD FX 4300
- Memory
- 8 GB RAM
- Graphics
- NVIDIA GeForce GTX 660 | AMD Radeon HD 7870 | Intel Arc A310 | Intel Iris Plus G7 | AMD Radeon Vega 11
- Storage
- 20 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS
- Windows® 10 (64-bit) or Windows® 11
- Processor
- Intel Core i5-8400 | AMD Ryzen 5 1600X
- Memory
- 16 GB RAM
- Graphics
- NVIDIA GeForce GTX 970 | AMD Radeon RX 480 | Intel Arc A580
- Storage
- 20 GB available space
- Additional Notes
- SSD or NVME drive recommended
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3% cashback on this purchaseCrusader Kings III FAQs
To activate your Crusader Kings III Steam key, open the Steam client and click Add a Game in the bottom-left corner. Select Activate a Product on Steam, enter your code, and follow the on-screen instructions. Once activated, Crusader Kings III will be added to your Steam library.
Your Crusader Kings III key is delivered instantly after purchase. Once payment is processed, the key will appear in your account dashboard, ready to reveal, copy, and activate through Steam.
Yes. GameBoost is a verified marketplace for digital gaming products, with over 19,037 verified Trustpilot reviews, instant delivery, 3% cashback in GB Coins, and 24/7 live chat support for buyers who need help before or after purchase.
You are eligible for a refund if the key has not been revealed and a valid refund reason is provided and approved by GameBoost, if the delivered key is not as described (wrong edition, wrong platform, or cannot be activated in your country despite being listed as compatible), or if the key is invalid or duplicated. You are not eligible for a refund if the key has been revealed and redeemed successfully, if the key works correctly and matches the product description, or if you do not like the game or have changed your mind. Contact GameBoost's 24/7 live chat support for any refund requests.
This product is a Steam key, not an account. You redeem the code on Steam, and Crusader Kings III is added directly to your own Steam library.
This key is available in multiple regions. Select your region at checkout to confirm availability for your country. If you are unsure whether your country is supported, check the activation details on the product page before completing your purchase.
Crusader Kings III is a grand strategy role-playing game. You manage a medieval dynasty across generations, using diplomacy, war, marriage, religion, inheritance, schemes, and character decisions to expand your power and protect your family line.
Crusader Kings III is more approachable than many older grand strategy games, but it still has a lot of depth. New players can learn through smaller starts, tooltips, tutorials, and slower campaigns before moving into more complex kingdoms and empires.
Yes. Crusader Kings III can be played fully in single-player. You can start a campaign, choose a ruler, build your dynasty, manage your realm, and continue through generations at your own pace.
Yes. Crusader Kings III supports multiplayer, allowing players to control different rulers in the same world. Multiplayer can lead to alliances, rivalries, wars, betrayals, and chaotic medieval storytelling between real players.
Crusader Kings III requires a 64-bit processor and operating system, Windows 10 Home 64-bit, 8 GB RAM, and 20 GB of available storage. Minimum specs include an Intel Core i5-750 or AMD FX 4300 with a GTX 660, Radeon HD 7870, Intel Arc A310, Intel Iris Plus G7, or Radeon Vega 11. Recommended specs include an Intel Core i5-8400 or AMD Ryzen 5 1600X, 16 GB RAM, and a GTX 970, Radeon RX 480, or Intel Arc A580.
Crusader Kings III is worth buying if you enjoy deep strategy games, medieval politics, role-playing systems, dynastic storytelling, and campaigns that can unfold in unpredictable ways. It is especially strong for players who like strategy games where characters matter as much as armies and borders.