Desktop - for Windows 7/8, OS X 10.8/10.9 and Linux. There are estimated to be over 2 billion PCs in use today.
Android - for the 4000+ Android phones, tablets and other devices. Over 1 billion Android devices have been activated to date. The most popular Android devices currently are the Samsung Galaxy S3, Samsung Galaxy S4, Samsung Galaxy S2, Samsung Galaxy Note II, Samsung Galaxy Y, Nexus 7 and Samsung Galaxy S.
iOS - for iPhone, iPad and iPod Touch. Over 700 million iOS devices have been sold to date. The most popular iOS devices are the iPhone 4S, iPhone 5, iPad 2, iPhone 4 and iPod Touch 4th gen. The newest devices are the iPhone 5S, iPad Air and iPad Mini Retina.
Windows Phone 8 Target
Windows Phone 8 - for Windows 8 phones. An estimated 30 million Windows 8 phones have been sold to date. The most popular Windows 8 phones are the Nokia Lumia 520, Nokia Lumia 920 and Nokia Lumia 620.
Windows 8 Target
Windows 8 - for Windows 8 devices and Windows RT devices. Over 100 million Windows 8 licenses have been sold to date.
XNA - for Windows desktop, Xbox 360 and Windows Phone 7. Over 80 million Xbox 360s have been sold to date.
Flash - best used for games running inside a browser on desktop computers. More than 500 million devices are addressable today with Flash technology. 24 of the top 25 Facebook games are built using Flash technology.
HTML5 - for any device that can run any modern browser - including the PlayStation 4, Xbox One, Wii U and many new TVs.
PSM - for PlayStation Vita. Over 6 million PlayStation Vitas have been sold to date.
For Ouya, the Android-powered console. An estimated 100,000 Ouya consoles have been sold to date.