Periodica
by Fixik42
Periodica is a NeoForge technology mod that reworks chemistry, ores and deep caves in Minecraft 1.21.1, and it needs Trimmed to run.
What it does
The mod extends the world downward to a lower limit of -128 blocks and adds new cave biomes at the deeper levels. Caves at those depths hold familiar biomes alongside tougher mobs, and hostile mobs grow stronger the deeper a player goes. Ores become less frequent, but each deposit holds a larger quantity of the ore.
Periodica also changes chemistry, based on real-life chemistry. Some ingots cannot be obtained by smelting in a furnace, and chemical reactions are required to produce them. New ores are added, along with electronics, armor, tools and blocks. A workbench lets players upgrade equipment, and steel and titanium armor can only be upgraded with tungsten. The developer plans to add more content, and a gallery in the mod lists information about some items.
The mod is meant to make the game harder and more realistic, and its settings can be customized. Trimmed is required. Periodica runs on client and server, so the server and every player need the mod. It is published for NeoForge only, for 1.21.1, under All rights reserved, and it is not open source.
Key features
Deeper world
The world reaches down to -128 blocks, with new cave biomes and tougher hostile mobs at greater depth.
Real-life chemistry
Chemistry follows real-life chemistry more closely, with chemical reactions needed for some ingots.
Rarer, richer ores
Ores spawn less often, but each deposit contains a larger quantity of the ore.
Equipment upgrades
A workbench upgrades steel and titanium armor, and tungsten is needed for the upgrade.
Customizable settings
Settings let players adjust how difficult the mod makes the game.
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
Questions
Does Periodica need Trimmed?
Does Periodica have to be installed on the server?
Which versions does Periodica support?
In the catalog
Periodica is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
In the new version of the mod, the world's lower limit is now -128 blocks. Ores have become less frequent, but the quantity within a single deposit has increased. In caves at the new depths, you may encounter familiar biomes as well as tougher mobs; the deeper you go, the stronger the hostile mobs become. A mod that…
Official listing
- Modrinth page
- modrinth.com/mod/periodica
- Owner
- Fixik42
- Published
- 2026-03-22
- Updated on Modrinth
- 2026-08-29
- Facts verified
- 2026-10-15