Well shit. Why didn't I know about this one?
Tbh, finding the titles of good VR games is difficult, since Indie doesn't advertise well and market is small, and big studios don't seem to release that many good things/much at all, think market will explode within the next 2 years due to huge influx of quest, but then they will be on quest and not steam. Need a quest competitor on PC, SteamOS will hopefully bring this, maybe we'll get a need Valve index with SteamOS support soon enough and then they just need to make sure Steam link works well.
Then general "horror" games:
FOREWARNED is a 1-4 player co-op survival horror. Delve deep into ancient Egyptian ruins with your team of fellow archaeologists. Investigate phenomena, collect treasure, discover lore, survive danger, and banish the evil that lurks within.
store.steampowered.com
Got a bit more press and it looks like it could be fun with 4 VR players, but it's not needed, you can also be the only VR player, similar to phas.
And then proper horror:
You can also do Five Nights at Freddy's in VR now.
And then the exorcist:
https://store.steampowered.com/app/1156250/The_Exorcist_Legion_VR_Deluxe_Edition/
Then non-horror good games in VR that you should try is the doom port, it's a lot fo fun.
Quest:
https://www.doom3quest.com/ which you get through sidequest:
https://sidequestvr.com/app/2651/doom3quest
And Index version is BFG, haven't tried it, is a mod as well
https://www.reddit.com/r/ValveIndex/comments/o6qtnt