The following is a list of quotations from Diablo. While there are separate voice files for the Lurkablo skin, they are unintelligible.
- "Bear witness to the power of terror, angel."
- "Can you?"
- "Do not become a liability, nephalem."
- "I look forward to it."
- "Try not to get stepped on."
- "Oh, what an evil thing to say!"
- Prime Evils
- "Come, brother! Our victory awaits!"
- "This world will burn with our coming."
- "Now we see why you are a Lesser Evil."
- "Your gods abandon you, nephalem."
- "Burning Hells, it's about time. (laughs)."
- "It is inevitable, angel. All will be consumed by terror!"
- "Perhaps you require more training, Uther."
- "Kneel before the Lord of Terror."
- "The Prime Evils will consume this world!"
- "Better to reign in the Burning Hells than serve in the High Heavens."
- "It begins."
- "Kneel before the Prime Evil."
- "Fear is not always an illusion."
- "Only fools rush in where angels fear to tread."
- "Let's make a deal."
- "I have a splitting headache!"
- "Soy maléfico." (Spanish: "I'm evil.")
- "Teerts eht gnissorc erofeb syaw htob kool nerdlihc doog!" (Backwards: "Good children look both ways before crossing the street!")
- "The Prime Evils can never be divided... Except by one. And evil."
- "Ever heard the one about the warrior who thought he could put a soulstone in his head? It's an enthralling tale!"
- "You know, I'm not such a bad guy, really. I'm just misunderstood."
- "In the afterlife, you're headed for some serious strife."
- "Is it hot in here? You know what, it's probably me."
- "That's a nice soul you've got there. It'd be a shame if something happened to it!"
- "I am seven in one. Tathamet's fury."
- "Terror comes in many forms. A child. A warrior. Even... A friend." (laughs)
- "Sometimes three plus four equals one."
- "Some days I dream of an inn in the countryside. Burning to the ground."
- (Leah's voice): "Can anyone hear me? I need you. I need you to give into (Diablo's voice) terror. It's the only way."
- "Perhaps I actually did need those hell rifts."
- "Brevity is the soul of terror."
- "Let your nightmares be nightmares. Do it!"
- "No, the mouths on my shoulders do not speak." (Sound of wailing). "They do not." (More wailing) "And they won't stop!"
- "Fear tastes of chicken. Everything tastes like chicken."
- "It's simple. The Prime Evils and the Lesser Evils combine to make the Prime Evil. Questions?"
- (Said in reverse): "Reversing backwards messages is a waste of time. Trust me."
- "My power seems limited in this... Nexus. No matter. All realms will burn before me."
- "These days, I'm of seven minds about everything."
- "Now you shall know my wrath!"
- "Your fear betrays you!"
- "All will be consumed by terror!"