SteamVR Driver for Razer™ Hydra
Release date: Jul 28, 2016
Developers: Andras Beck
Publishers: betaVR
Genres: Utilities
Supported languages: English

Usage Button mapping Middle button Mapped to: (Vive) System button Button 4 Mapped to: (Vive) Application Menu button Bumper button Mapped to: (Vive) Grip button Joystick button Mapped to: (Vive) Touchpad button Joystick Mapped to: (Vive) Touchpad Button 3 (Compatibility) 'Hold thumbpad' About the Software This driver adds support for the Razer Hydra motion controller in SteamVR. IMPORTANT! Before installation, make sure to uninstall 'OpenVR Driver for Razer Hydra' from your programs list in Windows! Not doing so can lead to unexpected behaviour. Compatibility To emulate a touch gesture on the Vive's trackpad (e.g. swiping), press and hold BUTTON3 to start 'touching the trackpad', and then use the joystick to make the gesture. UE4 games need to be run in compatibility mode. Check this thread for instructions: 

Press reviews: “Today is the day all of us old Hydra users have been waiting for! That’s right! (...) anyone with a DK2 or a CV1 and a Razer Hydra can now play ALL of the HTC Vive games that are built in SteamVR! So much more content to enjoy!” VR Spies “In one respect this is even better then Oculus Touch – because you immediately have access to a large catalog of games on SteamVR (and navigating SteamVR itself) using motion controllers.” Tales From The Rift