Corpus et Spiritus

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• Announcements·28 Aug 2026Official

  Release Date Announcement and Open Beta Playtest

  Good news, everyone: Corpus et Spiritus is almost finished! The content of the game has been locked — the text at least, as it's been sent for translation into Japanese and Simplified Chinese. And I am happy to announce that the game will be released on Wednesday, September 23! Less than a month from now!But, before we let the shiny money flow in, there is one last big milestone I want to go through: the Open Beta Playtest! It's going to happen on Steam, and for about 3 days, everyone will have access to the full game, for free. And it starts: now!Corpus et Spiritus is an alchemy deckbuilder without combat. You signed a pact with a demon, and it was a bad idea… Gather rare metals, then use your alchemy workshop to transform them into powerful cards and game-breaking talismans. Build powerful decks, experiment with different strategies, and uncover powerful combos to break out of the pact before your partner kills you!Wanna join in on the fun? Hop into Steam, click the Join the Playtest button on the Corpus et Spiritus page, and the game will be installed and ready to play in just a few seconds. The game will run on Windows, Linux, and Steam Deck — though I haven't been able to test that just yet.Then play to your heart's content! If at any point you notice a bug, or something frustrating, or something that you particularly enjoy, please hit the F8 key and send us your feedback. We'll use that as the primary source to fix those bugs and make the game as good as possible for its prime time, on September 23!What's new?So much has changed in the game recently that I won't go into the details. But here are some of the keys things we did in the last few months:We redesigned most of the content, cards and talismans. Some mechanics have been removed, and multiple new ones have made it in. We also added the content we intended to have, leading to the game having a total of 159 cards and 85 talismans.We added 5 new starting decks, for a total of 6 decks you can play with! The...
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• Patch Notes·15 Jun 2026Official

  Next Fest Demo Update

  Dear Alchemists,We are very happy to announce the release of a brand new demo of Corpus et Spiritus, right in time for Steam Next Fest! We have done a lot of balancing to make the game more fun and more accessible. There are a bunch of new cards, some talismans that have changed, and we've fine-tuned the mechanics of the game.We've also made a brand new trailer for this update, check it out:As you probably noticed, the Next Fest has started! It means it is time to play demos, and we sure hope you'll give Corpus et Spiritus a try. If you like it, please share it with your friends! For a small team like us (hi, we're Adrian and Théo! 👋), word of mouth has a huge impact and would greatly help us reach new people. So, spread the love! ❤️Play the demo, leave a comment, wishlist the game, and most importantly: ✨️ have fun! ✨️Changelog - Next Fest UpdateGameplayThe ingredients of Transmutation recipes are always shown, only the outcome is discovered after trying the recipe at least once.The Homunculus no longer asks for Vitality in its deals — Vitality is only used to refuse deals.Deals have been reworked, they no longer offer metals, actions or card draw, they only offer cards and talismans. The rarity of offered items has been rebalanced.Starting experience and intelligence have been increased to 6.The cost of refusing a deal is now never reset, and grows with each refusal.Rage now increases at the start of each turn, and not when you refuse a deal. It is reset when you reach a knowledge threshold. So essentially, you have 7 turns to reach each threshold or you lose.Quality of lifeSome parts of the workshop have been disabled in the demo. You'll have to buy the full game to get them again! 🙂You can now click the Homunculus to get out of the Deal view.The Homunculus knock animation won't play anymore after you've opened the deal view.ContentThe "discard" mechanic has been removed entirely, as players struggled to understand it, and differentiate it from recycling. Some ca...
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• Patch Notes·4 May 2026Official

  A small update for the Deckbuilders Fest!

  Dear Alchemists,Corpus et Spiritus is part of the Deckbuilders Festival that has just started! For the occasion, we pushed a small update to the demo, fixing a talisman that could create an infinite loop.We've been delighted with the reception you gave to our demo, and we thank you all for your feedback! We are working on improving the game and creating more content for the release, and we will keep updating the demo regularly, so be sure to check it out from time to time! ❤️📝 ChangelogQuality of lifeYou can now choose a card or talisman during a draft by clicking on the item itself (as well as clicking the "Choose this" button).ContentTalisman Moody medallion (en) / Médaillon lunatique (fr)Now only triggers the first time you gain intelligence each turn. This prevents an infinite loop with the Sharp design card that broke the game.🤝 Join the community!
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