Open-source alternatives to Thunder

Cocos2d-x is a high-performance C++ game development framework designed for building and deploying interactive applications across mobile, desktop, and web platforms. It functions as a cross-platform game engine that utilizes an entity-component system to manage object lifecycles, behaviors, and spatial relationships within a unified codebase. The engine is distinguished by its specialized 2D graphics rendering pipeline, which is optimized for hardware-accelerated performance when displaying sprites, particle effects, and skeletal animations. It provides developers with low-level access to gr

I'm Ivan Polyacov and this is my code library which I'm making and using in my games and other projects since early 2000x at Apus Software. It is used in many games including Spectromancer, Astral Heroes and others. Most code I wrote myself, but some minor parts were taken from other sources.…

Solar2D Game Engine main repository (ex Corona SDK)

JavaScript Game Engine

We recently reset this repository for working on a new version, at the moment we're making experiments. If you are looking for the old one, find it here.

A lightweight and simple base structure for games, using Heaps framework and Haxe language.

Game engine for creating retro games for modern computers. Inspired by Pico-8 and powered by Ebitengine.

Ouzel is a C++ game engine mainly targeted for development of 2D games.

Engo is an open-source 2D game engine written in Go.

A high speed C++17 Vulkan game engine

Cross-platform 2D framework written in Haxe that can export natively to desktop (windows, mac, linux), mobile (ios, android), web (js webgl) and to unity projects

A multi-platform Vulkan / WebGPU / OpenGL game engine that works on Desktop Java, Android and browsers.

Pixel is a 2D game library and graphics engine for the Go programming language. It provides a hardware-accelerated renderer for drawing sprites, geometric shapes, and text, utilizing an optimized system of batching and transformation matrices. The project functions as a comprehensive toolkit for two-dimensional interactive applications, combining a graphics engine with a 2D vector math library for affine transformations and coordinate space projections. It includes a dedicated input manager that tracks keyboard presses and mouse movements using a polling-based system rather than asynchronous

Please note that Oryol is currently not actively maintained and hasn't been for a long time, my focus is currently on the Sokol headers and (from time to time) on the Chips emulator stuff.

FNA - Accuracy-focused XNA4 reimplementation for open platforms

This is a web-based 3D game engine designed for creating high-performance interactive experiences on web and mobile platforms. It functions as a real-time graphics renderer and physics engine, utilizing a component-based scene graph to organize entities and their properties for three-dimensional rendering. The engine includes a visual scene editor that allows for the design of environments through a graphical interface, which then exports these assets as executable code. Its broader capabilities cover real-time graphics rendering for 2D and 3D elements, physical world simulation for object c

KlayGE is a cross-platform open source game engine with plugin-based architecture.

egriden is a framework for the Ebitengine game engine, perfect for creating simple grid-based puzzle or strategy games.

Ebiten is a cross-platform 2D game engine and framework for the Go programming language. It provides a hardware-accelerated 2D renderer and a multi-input handling library to develop two-dimensional games with a single codebase. The engine is designed for broad deployment, allowing applications to be compiled and run across desktops, mobile devices, web browsers, and gaming consoles. It distinguishes itself by integrating custom shader programming for specialized visual effects and providing haptic feedback control for mobile devices and gamepads. The framework covers core game development ca

Free, cross-platform 2D game engine powered by Haxe and OpenFL

The Lime repository has moved to https://github.com/openfl/lime

A cross-platform native backend for Haxe projects

c++ toolkit for rapid development of live graphical apps and games

C++, SDL 2 and SFML game engine that allows to create games on Nintendo Switch, Web (HTML 5), Mobile and PC.

Polycode is a cross-platform framework for creative code.

A lightweight game engine written in modern C++