Screenshot 1 of 5. A grey stone castle with orange lava accents and a golden ledge sits on a floating island in Structure Mayhem.
Structure Mayhem is a Bedrock addon by Sir_Rel that adds 180 new structures, among them a Floating Castle, a Piglin Prison and an Underground Labyrinth. It is Bedrock only and needs no experimental toggles.
Supported versions
- Minecraft 26.40.
What it adds
Hidden spawners sit inside several of the structures. A few of the larger ones:
- Floating Castle, packed with boosted skeletons, hidden spawners and treasure.
- Monster House, a many-roomed loot maze with hidden spawners and creaking hearts.
- Underground Labyrinth, the largest structure, with floors reaching the bottom of the world.
- Piglin Prison, the second largest, with cells of unarmed wither skeletons and brutes on guard.
- Jungle Pyramid, a maze of rooms and secret rooms.
- Floating Village, in every village type plus jungle and swamp.
- Ruins, wrecked buildings spread across all three dimensions.
Leader mobs and loot
Leader mobs are heavily buffed and boost the mobs around them. Royal Wither Castle holds two of them, Princess Darkrose and Prince Marrow, with Nether fortress chests and gold and diamond blocks. Ironeye's Ship is led by Captain Ironeye, Lord Frostshaw guards his throne, and Lord Oinkers runs a harder, richer take on the piglin bastion. Wither skeletons also have a small chance to carry a bow instead of a sword.
Installation
The newest file is a single .mcpack, so opening it with Bedrock imports it. Then switch the behavior pack on in the world settings. There is no resource pack, because the addon is nothing but structures. The install guide covers the steps on each platform.
Questions about Structure Mayhem.
3 questions
How do I install Structure Mayhem on Bedrock?
Open the .mcpack file with Minecraft Bedrock so it imports, then enable the behavior pack in the settings of the world you want to play. For a manual install on Windows, place the pack folder in behavior_packs under the com.mojang folder. If it fails to load, the add-on troubleshooting guide helps.
Does Structure Mayhem need experimental toggles?
No. The addon's own page states that no experiments are needed. It also ships without a resource pack, since it only adds structures, so you only enable the single behavior pack in your world settings.
Can I use Structure Mayhem on Java Edition?
No. Structure Mayhem is a Bedrock Edition addon, and Java Edition cannot load add-ons in this format. Bedrock players on phones, tablets and Windows can import the pack by opening the file with the game.
