Hackergeist: Electronic Grimoire of Cybersigils of the Cthulhu Mythos

From the introduction:

The internet. It is everywhere and nowhere. Like the spirit realm. Like the Dreamlands. Like countless unseen worlds parallel to our own. It has become an alternate dimension unto itself; a living, growing system. One that cannot be stopped, or contained, or controlled, no matter what the preachers or the politicians tell you.

It has become a way for some entities to breach into our reality, to make contact with humanity; where thoughts become things, electric dreams become experiential, and vloggers become web gods.

We're not hacking systems, we're hacking dimensions.

Online. Offline.

Out of space. Out of time.

End of line.