Advanced Mobility Mechanics
by Sygikal
Advanced Mobility Mechanics lets players crawl through one-block cavities, climb walls and fences, and jump a second time in mid-air.
What it does
Crawling lets a player move through a gap one block high, provided the block above the feet is clear and the player is sneaking. Climbing works on fences, bamboo, chains, rods and similar blocks, and a player can also climb out of sand, powder snow and other blocks that normally trap movement. The mod targets the 1.21.4 – 1.21.8 range on Fabric, with Data pack builds also published.
Double jumping allows a second jump while airborne, and the mod is set up so that landing after a double jump does not cause fall damage on the same Y-level. Individual features can be turned off in the configuration, including running, crawling and double jumping, so server owners can keep only the mechanics they want. The server must run the mod, while players may join without it, so the server decides which mechanics are active for players.
Key features
Crawling through gaps
Sneaking under a single block of clearance lets the player crawl forward, with the block above the feet required to be clear.
Climbing blocks
Fences, bamboo, chains, rods and other climbable blocks can be climbed, and sand or powder snow no longer fully hold the player in place.
Double jump in mid-air
A second jump is available while the player is airborne, and landing from it does not deal fall damage on the same Y-level.
Toggleable mechanics
Running, crawling and double jumping each have a disable option, so a server can keep only the mechanics it wants.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who want extra movement options in survival or adventure play, and players on servers that run the mod.
How it compares
Mobility Modifications covers the same Fabric range and is published under All rights reserved, with files for 1.21 – 1.21.11. Smart Moving Reforged is open source under the GNU General Public License v3.0 or later and targets only 1.21.1. Mobility Flux is open source under the MIT License and covers 1.21.6 – 1.21.10. Advanced Mobility Mechanics is not open source and lists 1.21.4 – 1.21.8.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Advanced Mobility Mechanics | Fabric | 1.21.4 – 1.21.8 | Server required, client optional | 2025-06-22 |
| Mobility Modifications | Fabric | 1.21 – 1.21.11 | Client and server | 2025-12-13 |
| Smart Moving Reforged | Fabric | 1.21.1 | Client and server | 2026-06-08 |
| Mobility Flux | Fabric | 1.21.6 – 1.21.10 | Client and server | 2025-12-15 |
Questions
Does Advanced Mobility Mechanics need to be installed on the client?
Which loader does Advanced Mobility Mechanics use?
Can a server turn off crawling or double jumping?
In the catalog
Advanced Mobility Mechanics is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from Sygikal
Similar mods
What the author says
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…
Official listing
- Modrinth page
- modrinth.com/mod/amm
- Owner
- Sygikal
- Published
- 2025-03-09
- Updated on Modrinth
- 2025-06-22
- Facts verified
- 2026-10-15