Device-specific hardware tends to get overlooked by the third-party development community, but the S Pen from Samsung's Note phones might be the exception. There are a lot of Note users out there and it has a stylus that's actually worth using. Samsung is now offering game developers a way to better utilize that feature with the Unity Extension SDK, which can be downloaded from Samsung's developer site.
In case you're not aware, Unity is a 3D game engine that's used by a number of popular titles.
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