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Oneiron Expanse

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Oneiron Expanse screenshot 1
Pre-alpha Gameplay trailerWatch trailer on Steam ↗

Oneiron Expanse

Wondervault Games · Published by Wondervault Games · Official site ↗

Content notice: The game is set in a primordial world where human laws and moral constructs do not exist. The narrative adopts a "Naturalist" tone—depicting survival, predation, and violence as indifferent biological realities rather than "good" or "evil." While the text can be crude and visceral to reflect this harsh environment, it remains nonjudgmental and focused on the player's survival choices (e.g., harvesting a trapped creature vs. freeing it). The vast majority of the game’s "crudity" is delivered through text only. There is no rendered gore, dismemberment, or realistic depictions of physical trauma in the gameplay.

Last updated 28 Sept 2026

Your world is abruptly erased. Only the Oneiron Expanse remains; a Plane where your mental state evokes lethal potential. Embark on a deckbuilding odyssey where every card is a fragment of your will. Find the Dreamwright and dream your reality back into being... before your memories fade

Free to PlayComing SoonDJCTQ 16

Free

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Indie, Strategy · 2027 · More free games

About this game

GAME IS IN EARLY PROTOTYPE PHASE

KEY FEATURES

  • Active Mid-Battle Deckbuilding: Steal cards from enemy hands or sabotage their deck with your own. Break seals to manifest new powers and refine your strategy while the fight is still raging.

  • Four Primal Archetypes: No pre-set characters. Combine four powerful essences to craft a unique playstyle. With 300+ cards, the combinations are limited only by your insight.

  • Asymmetric Combat: Enemies play their own cards and declare intentions. Anticipate their combos and frustrate their plans to survive the Void.

  • Agency Over Luck: A roguelite where planning outweighs RNG. Every choice echoes forward, altering the narrative and your capabilities.

ABOUT THIS GAME

You were just doing your job. Unpacking boxes for a living. Clocking hours. Trying to get home to your loved ones.

Then your reality abruptly ended, consumed by The Void.

Now you stand in the Oneiron Expanse - a shattered desert of impossible stars, living stone, and forgotten worlds - holding a dagger that whispers in your mind. Your universe has been erased, devoured by entities that consume existence itself. Everyone you loved is gone.

Except your memory.

In this world, power isn’t cast. It’s daydreamed.

A World Unmade, A Journey Looped Discover a realm where the laws of reality have dissolved and strategy is your only currency for survival. Should you fail, the Expanse pulls you back, allowing you to loop through time with your hard-won memories and powers intact. Track down the Dreamwright and dream your world back into existence.

WHAT SETS DREAMWRIGHT APART

In-battle Deck Manipulation: Why wait for the end of a match? Use your whispering dagger to steal an enemy's key card, or break ancient seals to manifest powerful reinforcements when you need them most. Your deck is a living thing, changing with every strike. 

Flexible Deck Crafting: Abandon rigid character classes and preconstructed decks. With over 300 cards to discover, you are the architect of your own power. Master four dream archetypes [Nightmare, Lucid, Dissonance, Liminal] and weave them together. Experiment with dual and triple-archetype cards to craft a "dreamed deck" that plays like no one else's. 

Smart enemies and asymmetric play: Face enemies that play by your rules. Your opponents use cards and execute complex combos, but they are bound by the same logic as you. Watch their declared intentions, disrupt their timing, and turn their own mechanics against them. 

Consequence-Heavy Agency: This isn't a game of rolling dice. Combat rewards the prepared mind. While the paths through the Oneiron Expanse are unpredictable, your success is determined by your choices. Decisions made in narrative encounters echo forward, permanently altering your capabilities and the world’s reaction to you.

 

Deep Enough to Master: Approachability meets tactical depth. Simple mechanics draw you into the Oneiron Expanse, but the layered systems and broad set of card interactions offer immense depth for those who want to push the limits of reality. 

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • OS: Windows 10 (64-bit)
  • Processor: Dual-core 2.0 GHz
  • Memory: 4 GB RAM
  • Graphics: DirectX 12 or Vulkan compatible, 1 GB VRAM
  • DirectX: Version 12
  • Storage: 4 GB available space

Recommended

Recommended:
  • OS: Windows 10 (64-bit)
  • Processor: Quad-core 3.0 GHz
  • Memory: 8 GB RAM
  • Graphics: DirectX 12 or Vulkan compatible, 2 GB VRAM
  • DirectX: Version 12
  • Storage: 4 GB available space

Supported Languages

English

Latest news

  • AnnouncementsOfficial

    Pushing back the open playtest just a tiny bit

    Hi dearest communityWe planned to open up the playtest this week, but looking at the feedback from our early testers, we decided it is too early.Here is what is going on:UX and Readability: People pointed out that the mechanics were confusing and the UI made it hard to understand what to do. Even for a pre-alpha prototype, you should be able to play the game without fighting the interface. We are spending the next couple of weeks polishing the UX so the gameplay makes sense on its own.Art Overhaul: On the positive side, our team grew. We have two artists working with us now, and they updated most of the visuals. The game looks much better, even for this stage.We are delaying the open playtest for a few weeks because of this. We want to ensure the version you play is worth your time.Check out this short clip to see the current progress: Thank you for the patience and the feedback.
    Read full article on Community Announcements (publisher.wondervault)
  • Patch NotesOfficial

    Join us in Steam Deckbuilder Fest

    We are featured in the Deckbuilders Fest starting on May-the-4th (be with U) AND we’re getting ready to run our first open playtest. Yay!It’s going to be a very early build: basically the core combat, a few decks, and placeholder art/VFX. It’s not pretty yet, but it plays, and it shows what the game is about.Interested in play testing?We will be officially launching it at the conclusion of the Fest. AND! If you do it this week, during the Fest, we will be giving a 50% off on the launch day, to the first 50 playtesters. To qualify just: 1. Wishlist the game 2. Join our Discord server 3. Tell us "You want to playtest" Besides this giveaway,If you’re up for trying something rough and telling us honestly what feels good and what doesn’t, we’d really appreciate it. That kind of feedback is what helps us move in the right direction to make something that you love.We’re a small indie team just getting this project off the ground, so this is a big moment for us. If you want to follow along, wishlist the game!.
    Read full article on Community Announcements (publisher.wondervault)

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