The mod's just very well done but it's amazing how well the base game translates to VR. Talk about standing the test of time when your 2004 video game can be modded into VR pretty much seamlessly and then blow Triple and Double-A games that are specifically made for VR out of the water
EDIT: Thinking about it, Half Life 2 and it's consequences have been insanely culturally influential in the greater sphere. I mean from Gmod Youtube-Poops over to SFM all the assets are still relevant now due to skibidi toilet, and they're nearing 20 years old now.
I remember trying a VR version of HL2 on a Oculus DK2 years ago, I'll have to give it another go now.
How's gunplay in VR without a gun-shaped thing to hold?
It's pretty good on index controllers with an index headset. My biggest issue is not being able to hold the gun steady enough to aim at distant targets. It's worse in in-to-the-radius bc you're shooting at featureless black shadow people from a distance and you have limited ammo so you can't just spray and hope for hits. It works well in other games though. If you want more stable aim there are bunch of adjustable "VR Stocks" you can get but the price varies from "print it yourself/at the library" to like 200$ for the really fancy ones.