ModsJava
Alien's Extra Blocks
Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.
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.
Alien's Extra Blocks is a mod that adds 35 brand new blocks for building.
It adds new bricks, polished variants, stairs, slabs, and walls for blocks that should have in vanilla but don't including granite, diorite, andesite, and calcite.
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Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.1, 1.21.1
- 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 CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as aliens_extra_blocks-1.0.1-neoforge-1.21.1.jar — drop this file into the mods folder
- Download size: 295 KB
- Download link checked 2 Oct 2026 — working
These come from our own check of the pack file, not from the source page.