Siren Head is a cryptid aimed at people who grew up terrified of the Emergency Alert System

Designed by Trevor Henderson:

Sirenhead Facts! pic.twitter.com/1etaDmv5Mo

— 👁️Trevor👁️ (@slimyswampghost) October 6, 2018

Featured in this very short, effective horror game with PS1-style graphics:



And also available in this Silent Hill overhaul mod for Fallout 4: