- Complete Monster: Mr. Betty Krueger's Jeff the Killer audio dramas: Zalgo is an Eldritch Abomination who wants to be freed from his prison so he can turn Earth into a nightmarish world of eternal suffering. In House of Jeff The Killer, he revived Jeff, and ordered him to kill 3,000 people for him so that their bodies could be sacrificed to him. In Blood of Jeff The Killer, he is revealed to have corrupted children and turned them into killers for his army, and to have allowed Jeff to torment Jane in her nightmares. After being revived, he drains Dr. Englund's life force and raises an army of zombies to slaughter the world. During this, he taunts Jane and Toby about their pasts and the deaths of their family members. Even in a world filled with killers, rapists, and man-eating monsters, Zalgo manages to stand out.
- Funny Moments: Zalgo trying to become an SCP in SCP Foundation.
- Accidental Zalgo text, such as in faulty programs and software, tends to stride hilarity instead of horror.
- Fridge Brilliance: The last line in Zalgos song is, We are the drum, we are the song. In other words, Zalgo might actually represent self-infilcted harm humanity suffers.
- Nightmare Fuel: YES.
YMMV / Zalgo