Free, open source game engine online
The Tiny JavaScript Game Engine That Can!
A refreshingly simple data-driven game engine built in Rust
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
A multi core friendly rigid body physics and collision detection lib
Powerful, mature open-source cross-platform game engine for Python
Eva.js is a front-end game engine for creating interactive projects
Open-source engine for Heroes of Might and Magic III
A fresh & lightweight javascript game engine
Animation Compression Library
3D Procedural Game Engine Using OpenGL
Haskell game engine library for roguelike dungeon crawlers
3D game engine/framework in C, with Luajit and Python bindings now
Engo is an open-source 2D game engine written in Go
A cross-platform, open-source, pure C game engine for mobile game
Rust library to create a Good Game Easily
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Urho3D Game engine
Embeddable unity game engine view for Flutter
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Svelto ECS C# Entity Component System
A pure Go game engine
Game engine supporting many 3D/2D formats and graphic effects
Retro game engine for creating games like it's 1997
Open source reimplementation of GTA San Andreas game engine in Unity