Crusader Kings III: All Under Heaven is a major expansion that brings the grand strategy, role-playing, and simulation elements of the base game into the historical landscapes of East and Southeast Asia. Released on October 28, 2025, alongside patch 1.18, this fourth major expansion extends the map across China, Japan, and Southeast Asia, allowing players to engage with new political systems, cultural traditions, and power structures while managing dynasties over generations.
Gameplay
The core loop centers on dynasty management, where players guide noble houses through generations of intrigue, warfare, and governance. In the Chinese region, the Hegemony title places rulers at the apex of regional power, while the Dynastic Cycle introduces periods of stability and upheaval that players can exploit or endure. The Celestial government system rewards merit earned through deeds or success in Imperial Examinations, which in turn influences access to the Imperial Treasury for funding projects or responding to disasters.
Japanese gameplay emphasizes courtly advancement and military options. Players navigate alliances and rituals to ascend as Shogun or Kampaku regent, or they can consolidate power through samurai forces. Leading the Imperial Yamato House offers a distinct path focused on restoring imperial authority amid shifting house loyalties.
Southeast Asian rulers operate under the Mandala Government as Devaraja figures. Selecting a Devaraja Aspect shapes long-term growth based on adherence to its principles, while Tributary Missions allow subordinate rulers to build favor or enable a player to consolidate a temple-centered empire. The expanded Silk Road facilitates trade and cultural exchange across the new territories, supported by fresh starting bookmarks that present specific historical scenarios.
Game Modes
All Under Heaven integrates with the existing singleplayer campaign structure of Crusader Kings III, where players pursue long-term dynastic goals without time limits. The expansion adds no separate competitive or cooperative modes but expands the sandbox through new government forms and regional objectives that shape how campaigns unfold in Asia.
Players select from updated bookmarks to begin at different points in history, each presenting unique challenges tied to unification efforts in Japan, Mandate claims in China, or tributary networks in Southeast Asia. These starting points encourage repeated playthroughs focused on alternate strategies within the same overarching simulation framework.
Regional Systems and Content
China features layered mechanics around merit, treasury management, and responses to instability that affect the entire region. Japan incorporates honor-based traditions alongside military and diplomatic paths that influence vassal relations. Southeast Asia emphasizes hierarchical tributary systems and divine aspects that scale with player actions.
New events, throne rooms, and cultural traditions reflect the distinct histories of each area. These additions build directly on the base game's simulation of succession, alliances, and internal politics without altering core progression systems.
Is It Worth Playing?
Player reception on Steam stands at Mixed, with 68 percent positive reviews from nearly two thousand submissions. The expansion delivers substantial new territory and mechanics for those already invested in Crusader Kings III's dynasty simulation. It suits players who enjoy managing complex political systems and exploring alternate historical paths across extended campaigns.
Those seeking focused military conquest or shorter sessions may find the added depth less immediately engaging. Ongoing support through the associated patch ensures compatibility with prior content, making the expansion a direct extension for existing owners rather than a standalone experience.
