Here’s a helpful, straightforward guide for installing Demon Deals — a popular fan-made expansion or mod for Slay the Spire (though the name may also refer to other indie card games or mods; this guide assumes the Slay the Spire version).
To install the adult RPG/Visual Novel Demon Deals developed by Breadman and Zakko, follow the instructions for your specific platform below. Android Installation Download the APK
Call to Action:
Did you use this guide in your game? Share your most outrageous demon deal story in the comments below. And don’t forget to download our printable Infernal Contract PDF (link) for your next session.
Extract the Archive: Do not run the game directly inside the ZIP file. Right-click the .zip file, select Extract All, and choose a permanent folder on your local drive.
For Pathfinder 2e
- Use the Infernal Pact ritual (level 6). It requires a contract of Nessi (50 gp).
- The demon gains the ability to cast Discern Lies on the PC at will.
- Install Rule: Breaking the contract gives the PC the Doomed condition permanently.
Video Walkthroughs: For visual learners, creators like Mr George on YouTube provide multi-part series covering the latest updates, including new character routes like Sunny. Demon Deals: Choices and Strategies Guide | PDF - Scribd
The demonic genius here is the no-refund clause hidden in the psychological subtext. Once installed, the user begins to experience "Outcome Narrowing"—every unexpected success, every open door, is attributed to the deal. Coincidence becomes proof. The guide’s true function is not to summon a horned figure, but to reprogram the user’s attribution bias, making them a willing slave to their own contract.
