Nik wrote:
Is this a viable way of playing H-L:A then?
Yes.
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The Oculus Quest seems to be either a standalone VR set, or PC-tethered.
Yes. Quest Link is a beta part of the Oculus software stack that tethers the headset to the PC via a USB3 connection. It sends the headset and controller information back the PC, and it sends a compressed video stream from the PC down to the headset. The compression is very good and most people agree you can barely notice it. I haven't noticed it at all.
What is more troublesome is that this is very definitely beta software and it's far from flawless. When it works -- which is most of the time -- it works great. When it doesn't work, I've had texture pop-in, random stuttering, or it simply refusing to start up. Rebooting the PC and the headset has always fixed this. I don't mind - it is clearly marked as beta, I knew what I was getting into, and it hasn't broken often enough to annoy me.
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I'm guessing it needs to be used as the latter for H-L:A?
Correct. Without the Quest Link tethering, playing games natively on the Quest, you're using an Android stack with about the same horsepower as a smartphone. It's perfectly viable but nowhere near powerful enough for Half-Life. On the other hand, you have no cables at all, which is nice.
Something to note about the Quest compared to other PC VR headsets is that it's a little bit less comfortable. It has a fairly beefy battery in, which makes it heavy - and worse, front-heavy. In turn that means you need to cinch the straps up a bit tighter to stop it wobbling. It's not a deal breaker but it is something to be aware of. I was happy with the tradeoff.
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Do you need a beefy PC/graphics card?
Yes. I am running it on a six-core i7 with an RTX 2070 Super, and the game quite stridently tells me I shouldn't go above High quality.