Mars's Fallout Expansion

Mars's Fallout Expansion

This project adds mobs, blocks, items, and mechanics seen in and inspired by the Fallout Universe.

by
231 Downloads
forgeadventurefoodmobs
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Screenshots

NEW IN 0.6: Lockpicking!
NEW IN 0.6: Uranium Ore!
NEW IN 0.6: Protectrons!
Mirelurks, Hatchlings, and Mirelurk nests
Radiation + Thirst Systems
Soda Machines

About this Mod

Title

War… war never changes… but your Minecraft world is about to.

Mars’s Fallout Expansion brings the dangerous, apocalyptic feel of the wasteland into Minecraft with new creatures, game mechanics, weapons, structures, blocks, and loot directly from and inspired by the Fallout universe.

This is my first mod, and the goal is simple: make Minecraft feel more hostile, more rewarding, and a lot more post-apocalyptic.

REQUIRES

GeckoLib

What This Mod Adds

Wasteland Creatures

Mirelurks!

Face off against familiar Fallout-inspired enemies, including:

  • Bloatflies
  • Feral Ghouls
  • Eyebots
  • Radroaches
  • Mole Rats
  • Mirelurks
  • Protectrons
  • And more to come

Radiation System

rad system

The wasteland is dangerous even when nothing is attacking you.

Radiation can build up from contaminated areas, irradiated food, Uranium Ore deposits, and other hazards. Manage your exposure, use protective gear, and keep yourself alive before the rads cook you from the inside out.

Thirst System

thirst system

Survival is no longer just about hunger.

You’ll need to watch your thirst, collect water, purify it, and think more carefully about what you eat and drink while exploring.

Weapons, Armor, Blocks, and Items

lockpicking minigame

Build, fight, and survive with new content inspired by the Fallout universe, including:

  • Wasteland weapons
  • Fallout-style foods and drinks
  • Decorative and functional apocalypse-themed blocks
  • Armor and survival items
  • Lootable containers
  • Lockpicking Minigame
  • And more

New Structures

abandoned structure

Find new Fallout-inspired structures to discover such as:

  • Destroyed buildings
  • Nuclear waste disposal sites
  • Scrap shacks
  • Mirelurk nests
  • Abandoned vehicles
  • RobCo Sales and Service Center
  • And more planned for future updates

Future Plans

  • More content is already planned, including:
  • Mr. Gutsy
  • Mr. Handy / Ms. Nanny
  • Vaults
  • Deathclaws
  • Fat Man / Mini Nukes
  • TACZ integration
  • More mobs, structures, weapons, blocks, and features

Final Note

This mod is still growing, and since it’s my first mod, feedback is welcome. Expect more updates soon!

Welcome to the wasteland. Hope you have some radaway.

Available Versions

Mars' Fallout Expansion 0.6release
MC 1.20.1forge
June 4, 2026
Mars' Fallout Expansion 0.5.2release
MC 1.20.1forge
May 21, 2026
Mars' Fallout Expansion 0.5.1release
MC 1.20.1forge
April 8, 2026
Mars' Fallout Expansion 0.5release
MC 1.20.1forge
April 6, 2026
Mars' Fallout Expansion 0.4.2release
MC 1.20.1forge
March 22, 2026

How to Install Mars's Fallout Expansion on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Mars's Fallout Expansion". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Mars's Fallout Expansion server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Mars's Fallout Expansion compatible with forge?

Mars's Fallout Expansion officially supports forge for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Mars's Fallout Expansion – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Mars's Fallout Expansion consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Mars's Fallout Expansion with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.20.1