CurseForge · Hytale mod

X_17: The Nightmare

You are never alone. X-17 The Nightmare adds relentless horror entities to Hytale, with adaptive stalking, cave encounters, 3D spatial sounds, original music, and nightmares you won't forget!

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which X_17: The Nightmare release should I use?

Updated 14 days ago

Latest stable file X17NIGHTMARE_v0.3.8.jar

Game version 0.6

Mod system Built-in Hytale mod system

X_17: The Nightmare X17NIGHTMARE_v0.3.8.jar targets 0.6. Do not install it as a separate client mod. Enable it on the world host—the local server in singleplayer or the dedicated server in multiplayer. No required dependencies listed for this file.

Where it goes

Where should X_17: The Nightmare be installed in Hytale?

Do not install it as a separate client mod. Enable it on the world host—the local server in singleplayer or the dedicated server in multiplayer.

Separate client mod Not supported

World host / dedicated server Required

Mod system for this release Built-in Hytale mod system

Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

Put Hytale mods on the world host or dedicated server. Singleplayer runs a local server too; Hytale does not use separate client mods.

Read the Hytale installation guide

What else does X_17: The Nightmare X17NIGHTMARE_v0.3.8.jar need?

X17NIGHTMARE_v0.3.8.jar. Change the file and its required mods may change too.

No required dependencies listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional project dependencies. Check the creator notes before changing an existing world.

Before you install it

Add X_17: The Nightmare without breaking your instance.

Built for X_17: The Nightmare X17NIGHTMARE_v0.3.8.jar. Pick another file and the loader, install side or required mods may change.

01
Stick to this file

Use X17NIGHTMARE_v0.3.8.jar. It targets 0.6; another release may target a different game build or dependency set.
02
Bring the mods it needs

This file does not list any required mods. Do not add a library just because a different file uses it.
03
Enable it on the world host

Do not install it as a separate client mod. Enable it on the world host—the local server in singleplayer or the dedicated server in multiplayer.
04
Pick the file you checked

Use the “Get this file” button beside X17NIGHTMARE_v0.3.8.jar. It opens that exact file at the source.

About this project

What does X_17: The Nightmare add?

Thanks for all the support! Thanks to everyone’s feedback and my creativity, we made it into the Top 10 in the Hytale New Worlds Contest (#1 mid contest drops)! I love you all, and I’ll do my best to keep improving and continue this project!

Before going foward, please read:

If it's your first time, play in a new world without any mods! But feel free to try with some of your favorite mods if you want.

Use first person and headphones for the best experience.

About the mod:

X-17: The Nightmare is a psychological horror mod designed to bring a chilling new presence to your Hytale world. The focus was to create entities that feel like a natural part of the game's world while delivering a truly terrifying and unpredictable experience.

The main feature of this mod is X-17 itself. Unlike standard mobs, X-17 uses a fully native AI system to stalk, observe, deceive, and take revenge in his own way.

But now, the nightmare has gone deeper.

With v0.3.4, X-18 has been added as a new mysterious and corrupted entity. While X-17 haunts the night, X-18 focuses on caves, mines, and players who stay underground for too long. He stalks from the darkness, uses his own animations and sounds, and can trigger terrifying cave encounters, including charge attacks, grabs, blackout moments, and sudden disappearances.

Nights and even caves won't feel the same.

Hiding? Maybe it works, maybe not, but they will find you, that's for sure.

This mod contains many smart and unique features made to surprise and scare all adventurers.

As this is part of my journey into Hytale modding, I focused on making those entities more than just a monster, it's a psychological experience that makes you rethink entering the dark and avoiding darkness and deep places. I hope they scare you as much during your adventures as they did me during testing!

Feedback is welcome, and please donate and support me so that i can keep working on this and take care of myself, thanks!

Official game documentation:

https://wiki.hytalemodding.dev/mod/x17-the-nightmare

Needing help or anything else? My main contact below:

Email: deadpan028@gmail.com

Or DM me on my social media links in my mod pages.

Project description from CurseForge.

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