The mod linked is to awkwardly play through the game without using VR using the debug mode outside of the workshop. If you want to test your own maps, you can do so by un-checking "Enable VR" from within the tools.

Half-Life: Alyx is one of the biggest PC VR releases in recent history. However, is it possible to play Valve’s flagship VR title on the Oculus Quest? The short answer is no — at least not

The project, dubbed "Half-Life: Alyx No VR," has been in production for the last two years and went into Early Access on March 28. It was missing some key features and a few chapters of the story

Play through Half Life 1 and 2 + episodes first if you haven't yet, or at least watch a lets play or something-- you CAN play Alyx without the context, valve is good at making that easy in their sequels, but it's much, much better, easier and more satisfying, if you have that previous experience, familiarity, and emotional investment!

Half life alyx as well as any steam vr game can be played with any pc vr headset. Grabbing a quest is a cheap way to get into pcvr if you can stomach dealing with Facebook. Refurb Quest is 199, you could play wirelessly with Virtual Desktop. If your Pc can handle it (and you don’t mind the FB BS), grab a Quest 2.

can i play half life alyx without vr