Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

Flax Engine – multi-platform 3D game engine

A Json based Rules Engine with extensive Dynamic expression support

Diablo 2 reimplementation on unity

WorkflowEngine.NET - component that adds workflow in your application. It can be fully integrated into your application, or be in the form of a specific service (such as a web service).

A lockstep solution include lots of deterministic library (Math,Collision,Navmesh,BehaviorTree,Serialization ...)

Open source Final Fantasy VIII engine implementation in C# working on Windows and Linux (Android and iOS planned too!) [Monogame]

Sucrose is a versatile wallpaper engine that brings life to your desktop with a wide range of interactive wallpapers.

UNITY engine RPG framework

A re-implementation of Freelancer

Editor for Microsoft RulesEngine - Blazor UI library intended for integration in Web or Desktop

A cross-platform, realtime physics engine for all .NET apps.

基于xlua的MVVM框架，支持Addressables, 统一渲染管线等Unity新特性

🐵 HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting

MonoGame.Forms is the easiest way of integrating a MonoGame render window into your Windows Forms project. It should make your life much easier, when you want to create your own editor environment.

A simple crossplatform heuristic PE-analyzer

A C# 2D Pokémon game engine and map editor.

A versatile game engine designed for creating video games and real-time apps.

This project has been sunset as of 1st Jan 2018 and is no longer supported or maintained

A high-performance alloc free c# Jobscheduler.