Along with the other comments, one extra thing to note is that the three-point tracking (head + 2 hands) is entirely standalone even when connected to a PC (pla

Along with the other comments, one extra thing to note is that the three-point tracking (head + 2 hands) is entirely standalone even when connected to a PC (platforms like Steam VR will translate it across), so you don't need any other hardware than that. Apps and games then generally either guesstimate the rest of your body positioning (using inverse kinematics) or just leave it out entirely by making you walk on your hands (like Gorilla Tag does - this actually works way better than it sounds). There are some additional standalone body trackers, like SlimeVR, Sony mocopi, or HaritoraX, where you strap the hardware widgets on and they communicate inertial measurements with each other and your device without needing any base stations. But, since there's no OS-level support for them on Quest, support is app-by-app and usually requires a second device as a go-between (like a phone running the mocopi app). PCVR makes it easy to use a ton of trackers and they're much more precise, but they require base stations (IR cameras on mounts you set up around your play space) since each one is basically a little IR transmitter with its position computed by the PC. If you see any "full body trolling" videos on Youtube it's generally people using these, since you can do strange things with them (handstands, pogo stick bouncing, multiple people sharing the same physical space, other Youtube creator nonsense) without the tracking getting confused or desynced.