About Once Fusion
The community-driven simulation and planning database for Once Human.
Goal
Once Fusion Guide was created to take the guesswork out of Deviation Fusion in Once Human. Fusing deviations requires significant in-game time and mutagens. Our platform provides players with probability estimations, detailed skill/trait reference sheets, and tracking tools to plan their fusions efficiently.
How the Portal Works
When you click to enter our portal, the system establishes a secure session. You can choose to proceed with a **Guest Access** key (which operates temporarily within your current browser session) or register a secure **User Account** to save your private deviation inventory across multiple devices.
Frequently Asked Questions
Does this application collect personal data?
No. I do not require or collect personal data. Account registration only requires a unique username and a password of your choice.
How are the probability metrics calculated?
The simulator runs using game mechanics data. By inputting your deviations and materials, then input its traits, skills or mutagens, the simulator calculates the probability of the outcome.
Can I use this on mobile?
Yes! Once Fusion is fully responsive and designed to work on phones and tablets while you play.
Why am I redirected to a login/choice screen?
To ensure your inventory lists and simulator histories remain private, all interactive calculators require an active session key. Accessing the main portal will guide you through session creation.