ModsFinder

Bunker Building Blocks

by ryankshah

Bunker Building Blocks adds Obsidian Alloy, a building material that keeps obsidian's blast resistance while letting pistons move it.

ForgeNeoForgeClient and serverMIT License1.20.1 – 1.20.6

What it does

Obsidian Alloy is made by combining a Copper Ingot with Obsidian, which gives Obsidian Alloy Ingots. Breaking the finished block needs a diamond pickaxe. Its explosion resistance matches vanilla obsidian, 1200, and blocks placed next to it are protected from explosions. Withers are immune to it, so it suits bases that must survive TNT and redstone contraptions.

The mod builds a full set around the alloy: bricks, tiles, a chiseled brick variant, pillars that rotate like quartz pillars, and slabs, stairs and walls. Obsidian Alloy Door and Trapdoor blocks give a bunker an entrance. Stonecutter support is included. The rest of the crafting follows vanilla patterns, so the recipes will feel familiar.

It runs on the client and server, so the server and every player need it. Files are published for Forge and NeoForge, for 1.20.6 as the latest release. The code is under the MIT License, and the mod is not open source.

Key features

  1. Piston-movable alloy

    Unlike regular obsidian, Obsidian Alloy blocks can be moved by pistons, which suits redstone builds.

  2. Full block family

    Bricks, tiles, a chiseled brick, pillars, slabs, stairs and walls are all available in the alloy.

  3. Alloy door and trapdoor

    Obsidian Alloy Door and Obsidian Alloy Trapdoor blocks provide an entrance that matches the walls.

  4. Stonecutter support

    Every alloy block can be cut at a stonecutter, which makes crafting variants quicker.

Compatibility

Latest build for each game version and loader.

1.20.61.0.01.0.0
1.20.51.0.01.0.0
1.20.41.0.01.0.0
1.20.31.0.01.0.0
1.20.21.0.01.0.0
1.20.11.0.01.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Heavy Bunker is a Forge mod for 1.20.1 under All rights reserved, with client and server files. SI: Refined Obsidian targets 1.20.1 – 1.21.1 on Fabric, Forge and NeoForge under a custom license.

ModLoadersGame versionsEnvironmentUpdated
Bunker Building BlocksForge and NeoForge1.20.1 – 1.20.6Client and server2026-03-16
Heavy BunkerForge1.20.1Client and server2026-07-12
SI: Refined ObsidianFabric, Forge and NeoForge1.20.1 – 1.21.1Client and server2025-08-01

Questions

Which loaders does Bunker Building Blocks support?

The mod is published for Forge and NeoForge only. Fabric files are not listed for it.

Does the server need Bunker Building Blocks?

Yes. Servers that run it need every player to install it too.

What tool is needed to break Obsidian Alloy?

A diamond pickaxe is required to break the block, the same tool requirement as vanilla obsidian.

In the catalog

Bunker Building Blocks is one of 12,078 Decoration mods on ModsFinder, and one of 6,149 Decoration mods for Forge. 11,154 mods support Minecraft 1.20.6.

Decoration mods12,078Forge modsMods for 1.20.611,154

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What the author says

Ever wanted to build a proper blast-proof bunker but hated that obsidian can't be moved with pistons? Yeah, me too. Obsidian Alloy is a new building material that combines the blast resistance of obsidian with the flexibility of normal blocks. Build your secure bases, hidden vaults, and TNT-proof redstone…
ryankshah, on the Modrinth page

Official listing

Owner
ryankshah
Published
2026-03-16
Updated on Modrinth
2026-03-16
Facts verified
2026-10-15

Tags

DecorationGame mechanicsUtilityAdventure
Open on ModrinthCompare