You can make it - Open Source MMORPG Platform
Fast and lightweight JavaScript game engine built on WebGL and glTF
utility collection for 2D game development in Java; sound-player
lua dev plugin for unreal engine 4 or 5
Game engine supporting many 3D/2D formats and graphic effects
Arianne is an engine to develop multiplayer online games like Stendhal
Vivid3D is an open-source 3D engine with powerful 2D UI.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Cinema Enters Game Console
Modern 3D engine and IDE written using C# and C++.
Example code for creating a 2D platform game in Java.
X3D Prototypes for the SMUOS Component
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A starter development kit that let you develop FF6-like games on PC.
A game engine written in the D programming language
An advanced flexible game engine for Java.
Um pequeno framework didático de games em Java
evolution for vegastrike SpaceSim/Combat/Trade game
Animation graph editor.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3