Which VR headset was the first to introduce 'inside-out tracking' technology that eliminated the need for external sensors/base stations in a consumer product?

Virtual Reality has transformed the gaming landscape over the last decade, with several key innovations pushing the boundaries of immersive gameplay. Major tech companies have fought for market dominance with their headset offerings, each introducing unique features that changed how we experience virtual worlds. Test your knowledge about the evolution of VR gaming hardware and the companies behind these innovations.

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Oculus Rift
Windows Mixed Reality headsets
HTC Vive
PlayStation VR