Yggdrasil Engine
Modular world simulation and narrative architecture
v0.4.0
What Is the Yggdrasil Engine?
The Yggdrasil Engine is a code-agnostic simulation framework built on the ASH Model of the Universe. It provides the structural foundation for generating infinite quests, mythologies, artifacts, creatures, civilizations, and player mythic identities — all derived from ASH cosmological mathematics. The engine is a modular, designer-extensible reality simulation layer. Designers build their own lore, settings, and narrative implementations on top of the framework. Rendering engines like Unity, Unreal, and Godot function as host environments. One flagship implementation of the framework is Yggdrasil Game.
Core Systems
ASH Pattern Engine
All procedural content derives from cosmological mathematics defined by the ASH Model. No subsystem may generate meaningful content independently of the cosmic state.
Default Structural Realm Model
A default nine-layer structural framework used to classify cosmological state, simulation boundaries, and generation logic. The framework preserves stable structural relationships for procedural consistency, while allowing designers to rename, reskin, and narratively reinterpret the layers for their own settings.
Dual-Variable Consciousness Model
A supported baseline model for paired, non-moral simulation variables that influence perception, quest generation, and narrative branching. The structural logic is balance-driven rather than dominance-driven. Designers may adapt this model into any analogous thematic system that fits their world, while preserving the underlying dual-variable relationship.
Perception Layer
The world state remains constant — perception diverges per agent. Supports multiplayer-safe narrative variation based on realm attunement and cosmic state.
Procedural Quest Generation
Quests are generated from ASH cosmic pattern state through pattern detection and agent interpretation. Every quest supports multiple completion paths with divergent consequences.
Myth Emergence System
A designer-reskinnable implementation layer where significant simulation events become persistent mythology, influencing future generation patterns across the world state.
Built on the Forsetti Framework
The Forsetti Framework enforces module contracts, runtime policy, and structural integrity through five design principles: Native-first, Contract-first, Boundary-first, Policy-first, and Host-agnostic modules.
Host Engine Adapters
The Yggdrasil Engine is host-agnostic. The core specification runs on any rendering engine.
Unity
Planned
Unreal
Planned
Godot
Planned
Contribute to the Engine
Explore the repository, read the specification, and contribute to the future of modular world simulation.
Looking for the flagship RPG built with this engine? Explore Yggdrasil Game →