JACS The Robot Classic Edition Addon for MCPE 1.21.90
Bedrock add-on listed for Minecraft 1.18–1.21 (behavior + resource pack). File opened and checked on 29 Sep 2026; installs from the MC Bedrock Mods app on Android.
⬇ DownloadClassic Edition is the simplified version of the JACS addon. Just A Combat System, are craftable robots that protect the player.
NOTE: JACS Classic Edition is the smaller version of the JACS addon. If you are interested in the full version, check my profile to view the other addon!
JACS, which stands for Just A Combat System, are robots the player can craft that can protect said player. There are 4 different robots the player can create, which most of the robots fight differently from one another. Classic Edition specifically keeps the basic robots and excludes the extra content if players want a simplified version of the addon while also being a potential solution to future-proof the addon from future Minecraft updates.
The differences between the classic and full versions are listed below.
Classic Edition contains:
- 4 craftable robots
- Components
- Updates and features from 1-1.5 and 1.7
Full Version contains:
- 15 craftable robots
- Azurite ore
- Weapons
- Tools
- Armor
- Enemies and bosses
- Components
- Trophies
- Azunetherite
- Food items
- Updates and features from 1- current updates
JACS Classic Guide:
There are 4 types of JACS robots the player can create:
- Red is the base version that will be needed to craft first before making any mode. They are melee-based robots and can deal wither towards their opponets.
- Purple is the shooter mode, which shoots fire.
- Yellow is the turret mode, which shoots arrows and stays in place.
- Green is Big Guy! A giant melee robot that can be rideable!
Every robot except for the turret JACS can be tamed.
Every robot can be healed for 30 HP using redstone.
Big Guy can also can be rideable, which makes traveling through the overworld an easy task, as they're fast and able to jump high distances.
Here are the recipes to create each robot!
JACS robots can be tamed and to do so, you can feed them an iron ingot. They will work on every robot except for turrets. If you need to move your turret robot, every robot can also be leashed!
No experiments are needed!
Updated on July 02
- Robots are now visible again for Minecraft 1.21.90!
- Custom items removed since the Minecraft update removed holiday creator features. This update fixes the problem of not crafting robots by going even more classic! No experiments are needed this time!
- Edition: Minecraft Bedrock
- File type: .mcpack or .mcaddon
- Minecraft version listed: 1.21.90
- How to install: Download the .mcpack or .mcaddon file. → Open it — Minecraft imports it. → In your world: Behavior Packs → Available → Activate, then the same under Resource Packs.
- Where to get it: In MCModsHub, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Bedrock addons & mods walks through it step by step.
- Pack type: .mcaddon — behaviour and resource pack in one file
- Manifest requires Minecraft 1.18.0 or newer
- Complete pack — everything it depends on is inside the file
- Download link checked 18 Jun 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.