DatapacksJava
Altitude Sickness│高山症
Java data pack listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Function│功能
Non-undead mobs will develop altitude sickness when their heads are at a position y>192, will have a 1/(320-current head height) chance of taking damage from lack of oxygen per second.│非亡靈生物頭部在y>192的地方會產生高山症，每秒有1/(320-當前頭部所處高度)概率受到缺氧傷害。
Usage example video│使用示例影片
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.9, 1.21.10, 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
File checked by MCModsHub
- Downloads as altitude_sickness_1.0.1+1.21.9.zip
- Download size: 214 KB
- Download link checked 9 Nov 2026 — working
These come from our own check of the pack file, not from the source page.