With the latest beta version of SteamVR Valve is now testing a new setup for controllers that makes things more customizable no matter what controllers you're using, what the game was designed for, or what capabilities the user has. With the new SteamVR Input system, developers are now able to offer alternate control schemes without updating the game itself, while gamers can adjust bindings for buttons and switches to their liking, then share those setups via Steam Workshop.
Source: Steam
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