CurseForge · Minecraft mod
ASPHYXIATION : NIGHTMARE
The Incarnation Of Fear, but red.
Quick answer
Which ASPHYXIATION : NIGHTMARE release should I use?
ASPHYXIATION : NIGHTMARE Multiplayer Fix (1.2.1, 1.19.2) targets 1.19.2 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is ASPHYXIATION : NIGHTMARE required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does ASPHYXIATION : NIGHTMARE Multiplayer Fix (1.2.1, 1.19.2) need?
Multiplayer Fix (1.2.1, 1.19.2). Change the file and its required mods may change too.
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 mods.
Before you install it
Add ASPHYXIATION : NIGHTMARE without breaking your instance.
Built for ASPHYXIATION : NIGHTMARE Multiplayer Fix (1.2.1, 1.19.2). Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Multiplayer Fix (1.2.1, 1.19.2). It targets 1.19.2 with Forge; another release may have different loader, side or dependency requirements.
- 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
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Multiplayer Fix (1.2.1, 1.19.2). It opens that exact file at the source.
About this project
What does ASPHYXIATION : NIGHTMARE add?
This mod is a difficulty and fear factor increase from the ASPHYXIATION mod. Directly inspired from the original CANTBREATHE having a nightmare difficulty, it makes him more powerful, faster, and adds more features and events that give to the name "ASPHYXIATION : NIGHTMARE"
If you'd like me to make more mods like these,
you can support me on ko-fi!
What he does:
NIGHTMARE "CANTBREATHE"
He spawns every 3-6 nights (configurable).
When spawned, he will immediately slowly crawl and stalk you.
He disappears after 64 seconds if he fails to stalk you (configurable length),
If you spot him or you get into a 20 block radius,
it triggers a cutscene similar but not the same as the Cave Dweller's "spotted"
You will have 5 seconds to run.
If he catches you then he holds you in place and impales your
head with his arm (instakill, configurable).
He disappears after 64 seconds if he fails to kill you (configurable length)
THE NIGHTMARE STORM
It happens with a 20% chance when NIGHTMARE "CANTBREATHE" spawns. (configurable).
If the storm occurs, a jumpscare will pop up and a split second later, everything
is red with a dark, dense fog around where it's hard to see.
and it rains slowly of blood with red lightning bolts killing every mob
in an 8 block radius where it strikes. Basically just hell in minecraft.
NIGHTMARE "CANTBREATHE" has permanent Speed 1 and every single
player in the world has permanent Slowness 1.
How to configure him:
There will be a file named "nightmare_asphyxation.toml" in your config folder.
#minimum ticks of how long cantbreathe takes to spawn (20 ticks = 1 second)
spawn-min = 12000.0
#maximum ticks of how long cantbreathe takes to spawn (20 ticks = 1 second)
spawn-max = 32000.0
#the amount of ticks of how long cantbreathe takes to disappear while chasing a player, best kept low cause of the kill multiply mechanic disappear-timer = 1291.0
#the square radius of which you have to look at for cantbreathe to activate the spot cutscene
spotted-radius = 10.0
#false removes the kill cutscene and replaces it with normal damage
insta-kill = true
#only works if you have instakill set to false
damage = 20.0
#speed of cantbreathe, for reference a player sprint jumping is 0.36
speed(DOESNT WORK YET) = 0.9
#doesnt really matter, hes supposed to be unkillable but i made it an option anyway.
health(DOESNT WORK YET) = 960.0
#disables the lightning when nightmare cantbreathe starts his spotted cutscene
nightmare-lightning = true
#the amount of ticks of how long cantbreathe takes to disappear while passive
passive-disappear-timer = 1291.0
#false removes the red particles around nightmare cantbreathe
nightmare-particles = true
#chance of the nightmare event happening when cantbreathe spawns. min:0 max:100
nightmare-event-chance = 20.0
#nightmare event support for different length of days e.g: you installed a mod that sets the day length from 24000 ticks to 32000.
day-ticks = 24000.0
#the thingies that warn you about day counter stuff thingies and shader stuff thingies
stuff-warn-thingies = true
#the max amount of blocks away he will spawn in a square radius(NOT DISTANCE, A RADIUS) spawn-distance = 96.0
Known bugs:
Update v1.2.1r has no reported bugs.
**Credits:
most of the "CANTBREATHE" sounds by - ClouddyVR
(Modified by - upsidedowntree)
climbing ai by - brguiireal** ideas, playtesting, literally 80% of the nightmare cantbreathe ideas, overall a HUGE help - VantablackDEV
GO JOIN HIS SERVER!!! https://discord.gg/jCTQKYRcBA
License:
Ren's Reskin License (RRLv1)
Redistribution and Modification
1.1. You may not reupload or distribute this mod’s JAR file on other platforms without permission.
1.2. You may modify this mod for personal use, but you may not distribute modified versions publicly without permission.Usage in Other Projects
2.1. You may use this mod as a dependency in your own projects (e.g., modpacks).
2.2. You may bundle this mod’s JAR file in your projects (e.g., modpacks), as long as you provide proper credit and do not claim ownership.Restrictions
3.1. You may not claim ownership of this mod or falsely represent it as your own work.
3.2. You may not sell, monetize, or distribute this mod as part of paid content without explicit permission.
3.3. You must not impose additional restrictions that prevent users from using this mod freely under these terms.Contact & Permissions
If you need permission for modifications, redistribution, or special use cases, contact either via discord (upsidedown_tree)(clouddyvr)
Project description from CurseForge.
Pick your setup
ASPHYXIATION : NIGHTMARE by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.19.2
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
ASPHYXIATION : NIGHTMARE versions and loaders
Multiplayer Fix (1.2.1, 1.19.2)
nightmare_asphyxiation-multiplayer-1.2.1r-1.19.2.jar
20 Feb 2026
Multiplayer Fix (1.2.1) (1.20.1)
nightmare_asphyxiation-multiplayer-1.2.1r-1.20.1.jar
20 Feb 2026
Bugfixes & Polishing (1.2.0) (1.20.1)
nightmare_asphyxiation-storm-event-1.2.0r-1.20.1.jar
27 May 2025
Bugfixes & Polishing (1.2.0) (1.19.2)
nightmare_asphyxiation-storm-event-1.2.0r-1.19.2.jar
26 May 2025
Looking for an older file? The official CurseForge project page is in Resources.