CTFs as you need them
Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Enables Roblox developers to use professional software tools
Desktop/Android/HTML5/iOS Java game development framework
Real Time Strategy game engine supporting early Westwood classics
One framework for creating powerful cross-platform games
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source HTML5 game framework that offers WebGL and Canvas
Open Source MMORPG Framework
A game framework written with osu! in mind.
ThinkPHP Framework
Unity3D Client And C# Server Framework
lua dev plugin for unreal engine 4 or 5
Open source library for creative expression on the web, desktop, etc.
Open source library for N64 development
Gideros Release version
You can make it - Open Source MMORPG Platform
Self-hosted CMS platform based on the Laravel PHP Framework
All-In-One program that combines multiple Fortnite Dev Account tools.
utility collection for 2D game development in Java; sound-player
Arianne is an engine to develop multiplayer online games like Stendhal
An isometric arcade-style game of skill, puzzles and exploration
Old-school 2D game engine
Game engine supporting many 3D/2D formats and graphic effects