XNA Game Studio is described as 'Microsoft XNA is a freeware set of tools with a managed runtime environment provided by Microsoft that facilitates video game development and management' and is a game development tool in the development category. There are more than 25 alternatives to XNA Game Studio for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is GDevelop, which is both free and Open Source. Other great apps like XNA Game Studio are CRYENGINE, ENIGMA - LateralGM, Torque 3D and Adventure Game Studio.
XNA Game Studio is mainly a Game Development Tool but alternatives to it may also be IDEs or Role-playing Games. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of XNA Game Studio.
GDevelop is an open-source game making software designed to be used by everyone. Any kind of 2D games can be created with it and no programming skills are required to get started. Logic of games are made using visual events.
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.
Panda3D is a game engine, a framework for 3D rendering and game development for Python and C++ programs. Panda3D is Open Source and free for any purpose, including commercial ventures, thanks to its liberal license. Go ahead and grab it here.
Stencyl isn't your average game creation software; it's a gorgeous, intuitive toolset that accelerates your workflow and then gets out of the way. We take care of the essentials, so you can focus on what's important - making your game yours.
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.
MonoGame vs XNA Game Studio opinions
pros, cons and recent comments
ddabrahim It is the community made open-source version of XNA
FPS Creator sets a new benchmark in the game creation market by providing an easy-to-use yet highly flexible editing environment. As its name implies this is a tool for creating action-packed FPS games with no programming or 3D modelling knowledge required.