The MonoGame Framework, used in conjunction with XNA development, has been used on titles like Fez and Bastion to help more easily allow for cross-platform development, a la what has made Unity so popular, and Siliconera says Nintendo wants the Wii U to be incorporated into the fold of platforms the framework supports. Currently, it supports iOS, Android, PC, Mac, Linux, Windows Phone, PlayStation Mobile, and OUYA.
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