DatapacksJava
Advanced Mobility Mechanics
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.
Advanced Mobility Mechanics adds new mobility mechanics to minecraft. These include:
- Climbing fences, bamboo, chains, rods, and more!
- Double jumping
- Crawling
To Double jump, jump into the air and sneak and jump again. (JUMP -> SNEAK -> JUMP) Double jumping will also negate fall damage as long as you land of the same Y-Level
To Crawl, look at a 1 block cavity (must be at your feet level and have a block above it) and then sneak and move forward.
You can also climb out of blocks such as sand and powder snow.
These features can be disabled by running /trigger amm.disable_crawling or /trigger amm.disable_double_jump.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.6, 1.21.7, 1.21.8
- 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.
Verified by MCModsHub
- Downloads as Advanced Mobility Mechanics v3.1.zip
- Download size: 7 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.