A game engine with an emphasis on real-time cutting-edge solutions
Zig game engine & graphics toolkit
A game engine powered by python and panda3d
s&box is a modern game engine, built on Valve's Source 2
Descent 3 by Outrage Entertainment
YimMenu, a GTA V menu protecting against a wide ranges
3D Engine c++
Real Time Strategy game engine supporting early Westwood classics
A dead simple 2D game engine for Go
IsoCity: City building simulation game
Fully async, multithreaded, predictive, open source, 3.01 reach
2D JavaScript Physics Engine
Game engine supporting many 3D/2D formats and graphic effects
3D game engine/framework in C, with Luajit and Python bindings now
Godot Minimal Theme
Godot game template and component-based framework
Minecraft server optimization guide
GemRB is a portable open-source implementation of the Infinity Engine
High performance UI layout library in C
JavaScript-based game engine designed to empower developers
A modern, cross-platform Quake game engine based on FitzQuake.
Action RPG that's easy to mod