Here is a Gatling gun controller that lets you get more out of your VR gaming experience. The Mag P90 Gatling VR Gun works with your HTC Vive controller. It is compatible with Serious Sam and other similar games.
MagP90 Gatling machine gun VR Controller user manual Video for HTC Vive
The bad news? Something like this doesn’t come cheap. More info is available here.
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