Orx
Orx - a portable open source game engine
20 Alternatives To Orx
Adventure Game Studio
Adventure Game Studio provides the tools to make your own adventure, for free!
AppGameKit
AppGameKit is a game development platform for mobile devices.
BYOND
BYOND is the premier community for making and playing online multiplayer games.
ClickTeam Fusion
[Multimedia Fusion 2 has been replaced by Clickteam Fusion 2.5.]
Cocos2d-x and Cocos Creator
Cocos Engine Official Website | Cocos Creator | Cocos2d-x | Open Source Cross-Platform Game Development Engine
Construct 2
Scirra Construct is a 2D game development engine with a focus on building games visually.
Corona SDK
Cross-platform mobile app development.
FlatRedBall
Cross-platofrm 2D game engine using C#, focused on developer productivity, transparency, scalability, and ease of use.
GDevelop
GDevelop is an open-source game making software designed to be used by everyone.
HaxeFlixel
Create cross-platform games easier and free. All with one codebase.
MonoGame
MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
Polycode
Polycode is a C++ and Lua framework for building interactive applications.
RPG Maker
Make your own PC game with RPG Maker. Our easy to use tools are simple enough for a child, and powerful enough for a developer. Try it free today!
RenPy
Ren’Py is a free and cross-platform visual novel engine that helps you use words, pictures, and…
Unity
The multiplatform game creation tools for everyone.
Unity3D
Unity is the ultimate game development platform. Use Unity to build high-quality 3D and 2D games, deploy them across mobile, desktop, VR/AR, consoles or the Web, and connect with loyal and enthusiastic players and customers.
Unreal Engine
Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Urho3D
Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released…