Kingdom of Ousia is a first-person fantasy dungeon crawler blending roguelike deckbuilding with time manipulation. Collect weapons that shape your deck, combine powerful equipment effects, and bend time itself to unleash devastating card combos.

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About This Game

Kingdom of Ousia

The kingdom has already fallen once. This time, its fate is in your hands.

In the final moments before the Kingdom of Ousia's destruction, humans and elves joined forces to send you back into the past.

Now, armed with the power to manipulate time, you must venture into dangerous dungeons, defeat formidable enemies, and change a future that has already come to pass.

Master Time, Rewrite Every Battle

Time is more than a resource — it is the foundation of combat.

Every card interacts with the flow of time. Chain attacks together, manipulate the timing of your actions, and rewind time to create new opportunities.

Combine cards and equipment effects to discover powerful synergies, turning carefully planned actions into devastating sequences.

Your Equipment, Your Deck

Your weapons define the cards available to you.

Different weapons offer different card sets, even within the same weapon category. Experiment with swords, bows, shields, and other equipment to develop your own fighting style.

Armor, accessories, and equipment affixes provide passive effects that interact with your cards and combat mechanics.

A new piece of equipment might do more than improve your numbers — it could change the way you play.

Delve Deeper, Discover More

Explore fantasy dungeons from a first-person perspective, face enemies with different combat patterns, and collect increasingly valuable equipment.

Experiment with new combinations of weapons, passive effects, and time-manipulation abilities as you prepare for the challenges ahead.

Build your deck. Master the timeline. Change the fate of Ousia.

AI Generated Content Disclosure

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

Generative AI tools were used during the development of this game to assist in creating visual assets, including character artwork, enemy designs, environment illustrations, and animations. These assets are generated and prepared during development and included as pre-generated content in the game.

No generative AI content is created during gameplay.

System Requirements

    Minimum:
    • OS: Windows 10 64-bit
    • Processor: 2.0 GHz Dual Core Processor
    • Memory: 4 MB RAM
    • Graphics: Intel HD Graphics 4000 or better
    • Storage: 4 MB available space
    • Sound Card: DirectX compatible
    Recommended:
    • OS: Windows 10 64-bit
    • Processor: Intel Core i3 or AMD equivalent
    • Memory: 8 MB RAM
    • Graphics: NVIDIA GeForce GTX 660 / AMD Radeon HD 7870
    • Network: Broadband Internet connection
    • Storage: 4 MB available space
    • Sound Card: DirectX compatible
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