Grimrock Facebook Page - Hijacked.

[Sir Tawmis]

I confirmed with the AH team that one of their FB accounts was compromised, and someone kicked out the rest of the admins, and posted the random video. They're in the process of recovering the page.

[Esenthel]

Also:
If you go to the main page
http://www.grimrock.net/
I see some spammy looking links:

Legend of Grimrock 1 has now launched for iPhone too! agrimectin ivermectin injection 50 ml 1 percent This means that the iOS version is now an universal app (so you only need to buy it once on App Store and you’ll get it on all platforms) and we’ve updated the game to have iCloud saves which lets you to continue your adventure on any iOS device, anywhere! ivermectina ces dose Just look for the cloud icon in the save game dialogue. para que se usa el medicamento ivermectina We’ve also customized the gui for the iPhone version so that the playability is great even with the smaller screen devices.

So, if you haven’t yet, now is a good time to buy the game for iOS! It’s only $4.99 on App Store!

These ones:
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para que se usa el medicamento ivermectina

Another post has some arabic looking text: "كيفية لعب الطاولة" no idea what that means.

And the another problem is the entire forum is going through HTTP instead of HTTPS, maybe that's related. Maybe someone hijacked your website because of this.

[Zo Kath Ra]

They didn't just hack the newest posts.
There's SEO spam everywhere.

As for the forums... looks like all new registrations are spammers.
Good thing registration is broken.