JDH

Klotho. Deterministic Unity & Godot framework for rollback, lockstep & server-authoritative multiplayer. Engine-agnostic pure C# core, FP64 fixed-point math, ECS, physics, navigation, and replays — frame-perfect, cross-platform reproducible.

MegaData. xpTURN.MegaData is a library that supports defining and managing various data structures and enables easy utilization of large-scale data in .NET-based projects.

WeakRef. Delegate, event, and `Action` wrappers that treat targets as "dead" when they are collected by the GC (plain C# objects) or destroyed in Unity (`UnityEngine.Object`). Reduces memory leaks and ghost callbacks.

AssetLink. A lightweight wrapper library for Unity Addressables system. It provides simple and safe handling of asset loading, prefab instantiation, and scene management. This is an Addressable asset reference type that can be used instead of AssetReference provided by Unity Addressables.

Lockstep. xpTURN.Lockstep is a lockstep synchronization system designed for real-time multiplayer games that require deterministic simulation. It ensures all clients execute the same game logic with identical results by synchronizing player inputs rather than game state.

XString. XString(ZString Add-on). ZString does not provide a dedicated API for interpolated strings, so this package aims to provide XString.Format($"...") and format-string overloads.

Polyfill. Runtime polyfill for C# 9·10·11 syntax (record, init, required, interpolated strings, etc.) in Unity. Provides BCL types and Editor support for -langversion and .csproj LangVersion auto-configuration.

XLogger. XLogger(ZLogger Add-on). It provides XLog* extension methods and uses scripting define symbols to completely remove log calls from the build.

Unity.Extension. Source code for Unity Editor extensions.