OHMM — Once Human Meta Metrics
An independent build-analysis and combat-modeling platform for Once Human, developed through local client-file research and observable gameplay behavior to explain weapon, gear, mod, and formula interactions with traceable calculations.
Overview
OHMM (Once Human Meta Metrics) is a client-side combat calculator and build optimizer for the game Once Human. It runs entirely in the browser with zero backend, telemetry, or network requests. OHMM was developed through independent analysis of locally installed game data and observable gameplay behavior.
Technical Challenge
Once Human’s combat system uses a formula graph with 42 canonical stat keys, 9 formula families, multiple damage scaling buckets, and conditional effects that depend on weapon type, element, keyword, enemy species, and debuff state. None of this is documented publicly by the developer. The work focuses on data formats, statistical relationships, combat formulas, and validation tooling.
Data Research & Source Recovery
The project required processing local client files from the installed game. A research pipeline identified the compression format (Zstandard with an embedded dictionary), located the required dictionary within the installed client, and validated extraction results. The pipeline successfully processed 90,626 local client files across the tested package set.
Combat Formula Modeling
The engine implements multiple formula families: physical weapon damage, status tick damage, burn stack DoT, charged status damage, and deviation skill damage. Each formula is traced through a multiplier breakdown showing exactly which stats contribute and how. All formulas are independently derived from observable behavior and structural analysis.
Current Status
OHMM is under active development. The formula engine, modifier aggregation, build graph, stat weight calculator, and UI registries are functional. Formula alignment against verified attribute data is ongoing, with proven semantics documented for each stat.
Technical Stack
- React 18 + TypeScript (UI layer)
- Vite 6 (bundler)
- Tailwind CSS 4 + shadcn/ui + MUI 7
- Pure TypeScript engine (no React dependencies)
- Python (data analysis scripts)
- Custom smoke tests via tsx
- 42 canonical stat keys, 9 formula families
OHMM is an independent project and is not affiliated with, endorsed by, or sponsored by NetEase Games, Starry Studio, or the publishers of Once Human. Technical research is based on analysis of lawfully obtained local client files and publicly observable gameplay behavior.