Duality - a 2D Game Development Framework
Duality is a modular 2D game engine that provides its own visual editor. It's highly extensible, written entirely in C# and backed by OpenGL.
Easily introduce game logic via plugin
Component Based Design
Allows your own code to blend in seamlessly
Rendering, Audio, Physics, User Input, ...
Takes care of all your game resources
Preview and Test directly in the editor
Modified Assets are automatically reloaded
Write code and test it directly without restart
Tailor the editor exactly to fit your game
For a lot of game libraries, your code has the active role of setting everything up and managing it. These roles are reversed here: Your primary job is to define objects and specify their behaviours - Duality can handle all the rest.
Drag files into the editor and drag assets into the game.
Type C# code for game logic and engine extensions.
Add bits of your code to objects in the game.
Duality is being constantly developed since 2011 - and it's just waiting for you to build great things.
This is the best open source engine I've ever worked with. Clean and understandable code, all pure .Net, an incredibly fully featured editor, and an awesome component-oriented approach to building games.Andrew O'Connor, BatCat Games
Easy to learn while still in-depth enough to develop everything you want.SirePi, forum user
Duality has just the right balance of code / design, and I think it's one of the engines standout features.hsnabn, forum user