So, as many of you have heard, Microsoft has killed off XNA and every game written in the framework is doomed.
Except that isn’t the whole story.
If you don’t know, XNA is a game development framework made by Microsoft to aid developers in rapidly creating cross platform games. The name stands for: XNA's Not Acronymed. Writing a game in XNA enables it to run on Windows, XBOX, Windows Phone, and the [now dead] Zune HD. The only real changes that need to be made are the controls and UI (different screen sizes). Even if you’ve never heard of XNA, chances are that you’ve played a game made in it if you’ve ever used a Windows Phone. One such game is ARMED! - which now has a Windows 8 version made in MonoGame. XNA was loved by a lot of people, and gained popularity because it was an easy entry point into 2D and 3D game development, and it was a good way to reuse code across platforms.