Not sure if the tie-in is official or if it’s even a game, but Irwando at Collective Detective posted a link to a possible game that looks intriguing.
The trailhead is at www.hmssrecruitment.org. You’ll need to register your email address and take a little quiz (not a hard one, I promise :). You’ll get a welcome message in a few moments.
The official start appears to be October 28.
I checked the whois and noted that the the site is registered to Remko Posthuma in Amsterdam.