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Desktop version seems to be only for Windows Store and Steam but your virtual machine set up should do. @guiltyparties has only Linux too.

I have a dual-boot system. The PC is nothing special, but seems to handle the graphics okay. I just can't justify a VR headset just for this event.

You don't need to use VR set. The Steam app has 2 options to enter. With and without VR set. I have no VR set yet neither. And it worked well and was fun.