We pleased to confirm that cocos2d-x for Windows Phone 8 is also now available.
Coco2d-x is one of the most popular and open source 2D game engine worldwide, and used by 570+ game apps crossing iOS/Android/Windows8. A
With cocos2d-x for Windows Phone 8, game developers can quickly develop new game apps, and easily migrate the existing game apps from iOS/Android and Windows 8 to Windows Phone 8. You can download the latest version at here, and please share its broadly to your game partners.
Announcing in Build keynotes: see http://www.buildwindows.com the keynote http://channel9.msdn.com/Events/Build/2012/1-001 includes some lovely demos of the frameworks if your interested in this is 1hour 30 mins in.
Announcing in cocos2d-x community website: http://www.cocos2d-x.org/news/76
Please see the following tutorials
Creating a New Cocos2d-x Application for Windows Phone 8
Porting a Cocos2d-x Application to Windows Phone 8
Understanding Cocos2d-x Tutorial
Cocos2d-x Porting Tutorial - www.developer.nokia.com/.../Porting_Cocos2d-x_Games_for_Windows_Phone_8
Note that it is the first version for wp8 which has v2.x API set migrated, this has been a cooperation between the Open Source community Microsoft and Nokia
Download link: Cocos2dx-2.1.0-wp8-2.0-alpha.zip
Github repo: github.com/.../wp8_v2