What is the Monster Factory?

The Monster Factory offers unique expertise in the field of sound creation, voice acting, localization, voice direction and sound design destined for many types of virtual monsters and creatures.

Over the last eighteen years, our talent has partaken in creating and designing voices for hundreds of monsters and creatures on more than forty video game titles, films and TV series.

What is The Factory’s secret weapon? Vocal Stunt Performers.

Vocal Stunt Performers possess the unique ability to produce inhuman, distorted, projected, and organic sounds without resorting to computer modification of their voices.

Their training enables them to create a wide range of guttural sounds and vocal effects naturally, without damaging their voices. Their mastery of vocal distortion and vocal endurance is unparalleled, making them ideal for all your vocal stunt work needs. They are invaluable assets in any studio environment.

Among The Monster Factory’s Vocal Stunt Performers are metal vocalists experienced in video game voice acting or with a background in acting, as well as trained actors and actresses comfortable with creature vocalizations and rough vocal effects.

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Creature Sound Effects Zombie Hordes – The Complete Horde Construction Kit Play Track 400 sounds included, 208 mins total From: $249

Launch Offer:
Save 20% on Zombie Hordes – or get the bundle and save 30%

Zombie Hordes is a massive sound library designed to bring overwhelming waves of the undead to your projects. Built by the creature vocalization experts at The Monster Factory, this collection captures every terrifying groan, scream, and snarl with cinematic precision.

Whether you’re working on a video game, film, or TV project, this library gives you the power to create hordes ranging from a handful of zombies to hundreds moving as one.

Key Features:

• 8 expert creature performers (4 male, 4 female)
• 4 distinct zombie vocal archetypes covering every style, from slow shamblers to frenzied infected
• 5 unique horde behaviors: Idle, Detection, Excited, Biting, Chewing
• Pre-designed hordes of 25, 50, 100, 250, and 500 zombies — drop-in ready for instant use
• Long and short audio loops for endless customization
• Recorded with 3× Sanken CO-100K microphones for full spectrum detail
• Rich UCS metadata embedded for easy search and workflow integration

Designed for Professionals:

• Game Developers – Build dynamic, reactive zombie hordes in real time.
• Sound Designers – Clean, well-organized files that drop straight into your DAW.
• Film & TV – Add terrifying authenticity to your horror sequences.

Expert Vocal Performances:

The undead come alive thanks to The Monster Factory’s trained vocal stunt performers, specialists in safe and sustainable extreme vocal effects. Every groan, shriek, and howl was performed naturally — no digital tricks, just raw vocal power.

Our team has already delivered undead chaos for Fortnite: The Walking Dead Experience, Baldur’s Gate 3, Dead by Daylight, and more. Now, that same expertise is available to you.

Get Zombie Hordes:
Whether you need a few unsettling moans or a full-blown apocalyptic swarm, Zombie Hordes gives you the tools to build it instantly!

Get the bundle and save 30%:
Looking for the ultimate collection of zombie sounds?
Get the bundle ft. Zombie Hordes and either Zombie Apocalypse (20,000 (!) extra sounds) or Zombie Core Ed. (2,400 extra sounds) at 30% off. Choose your preferred version below:

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Creature Sound Effects Zombie – The World’s Largest Zombie Library Play Track 20000 sounds included, 1369 mins total From: $199

Special offer: Get the bundle and save 30%:
Looking for the ultimate collection of zombie sounds? Save 30% by getting the brand new bundle featuring ZOMBIE HORDES library and ZOMBIE APOCALYPSE or ZOMBIE CORE EDITION.
Get the bundle here!

The Zombie Apocalypse has arrived, and the virus is spreading fast. This comprehensive sound library features 20,000 high quality zombie sounds, making it the most complete zombie sound collection ever released.

Expert Vocalizations
In today’s films and video games, zombies have four distinct vocal archetypes. The renowned creature voice talents from The Monster Factory have expertly performed all these vocalizations, covering every genre of zombie imaginable—from the fast-paced, ultra-rabid freshly infected to the slow, hauntingly wailing undead. Our team has been trusted by AAA video game companies for over 15 years, contributing creature vocalizations to games like Star Wars Outlaws, Dead by Daylight, Until Dawn, Hellblade 2, Baldur’s Gate 3, and many more. Their expertise in creating immersive audio nightmares is highly sought-after in the industry.

More Actions and Variations
Unlike typical sound libraries that limit diversity by offering only a few choices, Zombie Apocalypse delivers a wider range of actions and variations. With more options for nuanced performances, you can ensure that the sounds match every movement and action of your characters. The Zombie Apocalypse library covers a wide range of actions and intensity level, including:

• Breathing, Walking, Running
• Idle, Detection, Attacks
• Pain & Death sequences
• Biting, Chewing, Choking, and much more!

For the full list of actions, click here.

Voice Layering Options
For greater customization, we recorded each action with a consistent phonetic script, ensuring that different voice techniques can be perfectly layered together. You can mix 2, 3, or even 4 different voice techniques, giving you endless possibilities to create unique zombie sounds or even non-zombie creatures. Though designed primarily for zombies, this library’s layering capabilities make it versatile enough to design an array of creatures and monsters. It’s the most flexible collection of creature vocalizations available.

Distant Microphone Recording
While recording, we used a second Sanken CO-100K microphone positioned 3 meters away from the first, adding depth and nuance to the recordings. These distant microphone audio files will help you create richer ambiances, ensuring that not all zombies sound the same or come from the same distance.

Unparalleled Level of Audio Quality for Unparalleled Level of Terror
Recorded at Tone Studio in Montreal by James Duhamel, the Zombie Apocalypse library offers pristine audio fidelity with a 192 kHz/24-bit sample rate. This, combined with the talents of trusted voice actors and the increased variety of actions and variations, the layering option to keep your listeners immersed and on edge, makes Zombie Apocalypse the most complete and unique sound library on the market. If it is not the first zombie sound library you have bought, this one will definitely be your last.

Rich Metadata Embedded
Every file comes with UCS naming and detailed metadata, including file descriptions and keywords, ensuring that you can quickly find the right sounds for your project.

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Re-recording Mixer, Walt Disney Animation Studios:
Frozen, Big Hero 6

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Supervising Sound Editor/Re-recording Mixer, The Lego Movie & Mad Max: Fury Road

There are many great independent sound effect libraries available these days. The main problem with having so many, is keeping track of them!

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Sound designer:
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Director, Digital - Source Sound Inc.

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