Invasion Ferrocerium
Invasion Ferrocerium adds alien-themed machines and robotic units to Fabric worlds for Minecraft 1.21, with its own ore, parts and a set of hostile bots.
What it does
Alien machines fire a ferrocerium-based weapon at nearby targets, and the mod's bots come in three types: the Ant Scout Bot, the Ant Soldier Bot and the Alien Builder Bot. A fourth unit, the Alien Helicopter Bot, flies over the area. Defeated bots drop their parts, and the Dropped Ant Scout Bot can be recovered and used as a collectible item. The bots and machines are placed through world generation, so an invasion can appear in a new world without any crafting.
Cardinal Components API is required, because the mod stores bot and machine state through it. A server running it needs every connecting player to have it too. Files are published for Fabric only, for Minecraft 1.21, with 1.7.0-a-1.21 as the latest build on the alpha channel. The source code and the issue tracker are public, and the mod is released under the GNU Lesser General Public License v3.0 only.
Key features
Alien machines
Machines that fire ferrocerium rounds at players and mobs within their range.
Three bot types
The Ant Scout Bot, Ant Soldier Bot and Alien Builder Bot each take a different role during an invasion.
Alien Helicopter Bot
A flying unit that patrols the invasion area and adds air pressure to the encounter.
Alien parts and dropped bots
Defeated bots leave Alien Parts, and the Dropped Ant Scout Bot can be picked up as an item.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Invasion worlds
Players who want an alien threat in a survival world can let world generation place the bots and machines across the map.
Who it’s for: Server owners and players who want a sci-fi invasion theme with its own enemies and loot. Players on a server need the mod too, because the environment is client and server.
How it compares
Aliens & UFOs is open source under the MIT License, runs on client and server, and covers 1.21.1 – 1.21.8 on Fabric, so it reaches later versions than this mod. NoToolsBreak is client-side only under the Apache License 2.0 and built for 1.21, so players can use it without any server install. Totem Bot is released under the MIT License and covers 1.20 – 1.21.8 on Fabric, with client and server support.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Invasion Ferrocerium | Fabric | 1.21 | Client and server | 2026-09-30 |
| Aliens & UFOs | Fabric | 1.21.1 – 1.21.8 | Client and server | 2026-01-18 |
| NoToolsBreak | Fabric | 1.21 | Client-side only | 2025-11-06 |
| Totem Bot | Fabric | 1.20 – 1.21.8 | Client and server | 2025-12-21 |
Questions
Does Invasion Ferrocerium need Cardinal Components API?
Does the server need the mod?
Which Minecraft versions are supported?
In the catalog
Invasion Ferrocerium is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 15,770 mods support Minecraft 1.21.
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/invasion-ferrocerium
- Owner
- coolcatcher126
- Published
- 2025-09-02
- Updated on Modrinth
- 2026-09-30
- Facts verified
- 2026-10-15