Redot Engine is described as 'Feature-packed, cross-platform fork of the Godot game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel' and is a game development tool in the development category. There are more than 50 alternatives to Redot Engine for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Redot Engine alternative is Godot Engine, which is both free and Open Source. Other great apps like Redot Engine are Unity, Unreal Engine, GDevelop and Wick Editor.
One framework for creating powerful cross-platform games. The spiritual successor to XNA with 1000's of titles shipped across desktop, mobile, and console platforms. MonoGame is a fully managed .NET open source game framework without any black boxes.
Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released under the MIT license. Greatly inspired by OGRE and Horde3D.
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
cocos2d-x is a cross platform open source free 2D game engine for mobile gamedev, that is fast and stable, easy to learn and use.
Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer. It is used by MPEG playback software, emulators, and many popular games, including the...
Torque 3D is a easy-to-use game creation platform. Architected from the ground up for maximum flexibility and performance across a wide range of hardware and built upon the Frontline award-winning Torque Game Engine Advanced, Torque 3D comes equipped with a full suite of tools...
Adventure Game Studio (AGS) - is the IDE and the engine meant for creating and running videogames of adventure (aka "quest") genre. It has potential, although limited, support for other genres as well.
Phaser is a fun, free and fast 2D game framework for making HTML5 games for desktop and mobile web browsers, supporting Canvas and WebGL rendering.
Superpowers is an HTML5 development environment for making 2D and 3D games. It can be extended with plugins and lets you collaborate in real-time.
Browser-based 2D game creation engine using a visual event-driven system, integrates JavaScript for advanced development, requires no installation or prior programming, supports exporting to HTML5, mobile platforms, Xbox One, and enables real-time editing on any device.
Banquise is a global community of players and creators. Create any games or other interactive content in no-code and share it with the whole community.
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SDL is a library that provides access to the rendering, audio and input APIs. Redot is a fork of the Godot Engine with the same rendering, physics and audio server.
You can use SDL if you want to develop a tool, game or game engine from scratch.
However SDL is NOT an alternative to Redot. There is no "SDL editor" to quickly make games with it.