"The Soul of Cosmos"is a dark fantasy adventure game that combines plot choices, tower strategy, and simulation management gameplay. As an extraterrestrial soul, you will coexist with the young girl Yunxi, accompanying her on her journey to find her mother and explore different soul worlds.

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About This Game

“We offer hymns to the gods. The gods answer with a lament.”

War between humans and fiends flares anew, but the border village of Qinghe has already been forgotten.

At five years old, YunXi loses her mother overnight. When she wakes, a bracelet called Heartcandle rests upon her wrist, and a voice from another world stirs within her mind. That voice is your soul.

A mysterious summoning binds your fate to hers. You accompany YunXi through childhood and adolescence, watching her grow up alongside YangYuan and YangYu'er—and witnessing the calamity deep in the mountains that tears their lives apart.

When YunXi turns eighteen, the northern front faces a crisis. The garrison withdraws from Shadow Bone Tower, leaving the village exposed. YunXi and YangYuan set out in search of the missing YangYu'er, and of answers to the silence her mother left behind.

Ahead lie restless spirits beneath the Blind Moon, people abandoned by war, and the inner demons no one wishes to face.

You can speak within YunXi’s mind, but you cannot live her life for her. Every choice leaves a mark. And what begins as a search for her mother may become something else: learning to live for those who are still by her side.

Features

  • A journey together, beginning in childhood
    From a wooden cottage and herb garden to mountain streams and roads scarred by war, watch YunXi grow from a child left behind into someone who can choose her own path.

  • Two souls, one shared journey
    You are the “second voice” within YunXi’s consciousness. At crucial moments, your judgment shapes her state of mind and her actions.

  • Choices that carry a cost
    Attachment, self-preservation, reason, and the desire to protect others all leave their imprint on YunXi’s inner world, affecting relationships, combat conditions, and the price of moving forward. Failure does not simply erase everything. Its scars remain part of the story.

  • Two forms of combat
    Deploy companions and arrange formations to face bandits, beasts, and armies in conventional battles. In soul combat, fire Soul Stones and summon cards across a spiritual game board, breaking through manifestations of your enemies’ desires to reach the deepest recesses of their souls.

  • The Hundred Souls evolution system
    One hundred Soul Stones take on the seven sins, undergo purification, or become locked in their state through battles and story events. Over time, they record how you fight and the choices you make, forming a portrait of your soul that is yours alone.

  • Bonds that change with the journey
    YangYuan, YangYu'er, and the people you meet each carry their own wounds and ways of living. Your choices affect their trust, their condition, and how you move forward together.

  • Dark fantasy beneath three waning moons
    The Iron Moon, Blood Moon, and Blind Moon hold sway over order, werewolves, and restless spirits. Ink-wash landscapes, a spirit-sight alive with strange colors, and original music bring a beautiful yet perilous continent to life.

Content advisory: Contains depictions of war, loss of loved ones, physical injury, hostile spirits, and psychological distress.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI Generated Content Disclosure

As a solo independent developer, the core concepts, narrative, and visual designs of this game were entirely conceived by me. Due to the resource constraints of solo development, generative AI tools were used solely as assistive productivity aids during the production process:

Visual Assets & Art: A very limited number of early assets were referenced purely for compositional inspiration and color palettes. All final visual assets implemented in-game—including character portraits, backgrounds, and UI—have undergone manual repainting, detailed refinement, and layer reconstruction by myself.
Narrative & Localization: The original storyline, dialogue, and lore were conceived by me. AI was utilized strictly for preliminary proofreading and assistive cross-checking in multilingual localization.
100% of all content included in the final build has undergone strict human review and quality verification by me personally; no unreviewed or directly exported assets exist in the game. Furthermore, the game does not contain any live-generated generative AI content during runtime.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS *: Windows 7
    • Memory: 4 GB RAM
    • Storage: 1 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10
    • Memory: 8 GB RAM
    • Storage: 1 GB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.