Pixi’VN
Pixi’VN is a versatile and powerful visual novel/2D game engine. It is based on JavaScript/TypeScript and uses the PixiJS library for rendering.
 
Blazium Game Engine
Blazium Engine is a free, open-source fork of Godot for building cross-platform 2D and 3D games and applications, with the tools, platform integrations, and improvements you need.
 
Modoki Engine
Modoki is a TypeScript game engine and Unity-style visual editor for 2D, 2.5D and 3D mobile games. What makes it different is that it's built for AI agents. Through an MCP server, an agent like Claude Code can do almost everything a human can in the editor. It can read the live game world, edit scenes and prefabs, press Play, run builds, and check its own work with live data and rendered frames.
 
Gideros
Gideros is a cross-platform development environment for creating games and interactive applications in 2D or 3D. It is easy to pick up, quick to develop and robust to deploy.
 
Stride
A free and open-source 2D and 3D cross-platform game engine that can be used to create video games for PC, mobile devices and virtual reality or interactive content.
 
Excalibur.js
A free game engine written in TypeScript for making 2D games in HTML5 canvas, whether you're new to game development or you're an experienced game developer.
  Gondwana Game Engine
Gondwana is a cross-platform 2.5D game and rendering engine written in C#/.NET 8, built with SkiaSharp for graphics. It modernizes legacy Win32/GDI patterns into a modular, high-performance framework that runs on desktop, mobile, and web.
 
Bevy
A refreshingly simple data-driven game engine built in Rust
 
GDevelop
A no-code, open-source, free, and easy 2D/3D game-making app
 
Defold
A game engine for high-performance cross-platform games
  Eldiron
A cross-platform creator for classic role-playing-games (RPGs). It’s main aim is to create games similar to the RPGs of the 80’s and 90’s but with modern features as well as support for single and multi-player experiences.
 
Ebitengine
A dead simple 2D game engine for Go
  SDL Simple DirectMedia Layer
Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D. It is used by video playback software, emulators, and popular games including Valve's award winning catalog and many Humble Bundle games.
 
Redot Engine
Redot Engine is an open source fork of Godot with the goal of fulfilling the promise of Godot.
 
Ceramic
Ceramic is a cross-platform framework that lets you create 2D apps and games written in the Haxe programming language. It can export your app natively to Windows, Mac, Linux, iOS, Android, HTML5/WebGL and even Unity projects!
 
Doriax
A free and open-source, cross-platform game engine for creating 2D and 3D projects with Lua or C++. It is lightweight and promotes the simplest way to use the best performance of a data-oriented design.
  Felgo
Cross platform 2D games based on the Qt framework.
 
FLAME
2D game engine made on top of Flutter
 
Cocos Creator
2D/3D content creation tool integrating a flexible and visual editor system
  KNI
KNI, a fork of Microsoft's XNA Framework, is a simple and powerful .NET framework for creating games for desktop PCs, Mobile devices, Virtual Reality headsets and the Web, using dotnet framework & the C# programming language.
 
Solar2D
A Lua based game engine with focus on ease of iterations and usage
  openspace3D
Openspace3D enable users to explore 3D applications, from creating interactive and immersive experiences to simulating virtual environment, as well as designing professional mockups and developing video games
 
Godot
A free, all-in-one, cross-platform game engine that makes it easy for you to create 2D and 3D games.
  Carimbo
Carimbo is a lightweight 2D game engine written in modern C++. It features Lua scripting and is designed for high-performance deployment across all major platforms.
  LibGDX
A cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, macOS, Android, your browser and iOS
 
O3DE
An open-source real-time 3D engine
 
GameMaker
An easy-to-use engine that makes game design easy, regardless of background or skill level
 
Flax
A full-source code available and agile game engine
  TilBuci
TilBuci is a free, open source tool to create interactive content, focused on building interactive narratives like visual novels.
 
Ren'Py
A visual novel engine that helps you use words, images, and sounds to tell interactive stories that run on computers and mobile devices