I’m relatively certain this website is not official, and is just some thing some guy put up for fun. Ergo, even if the page flat out said “Half-Life 3 is releasing in 12 minutes” it would mean precisely dick.
Edit:
Registrant:
Joe Angry
Registered through: GoDaddy.com, LLC (https://www.godaddy.com)
Domain Name: BLAPPETURE.COM
Domain servers in listed order:
GINA.NS.CLOUDFLARE.COM
RAY.NS.CLOUDFLARE.COM
So yeah, unless the new CEO of Valve is named Joe Angry and they’ve started using Cloudflare, I think we should end this speculation before it begins.