Mekanism

Mekanism is a tech mod created by aidancbrady. Tech mod with advanced ore processing, energy generation, digital storage, and high-tech tools and armor. As a tech mod it concentrates on machines, automation, and resource processing, and it has been downloaded around 120 million times, which puts it among the options players reach for in this space.

Mekanism is built for tech players who want a long, tiered progression from basic machines to fusion power. Its ore-processing tiers multiply yields step by step, and the modular MekaSuit lets you bolt on flight, radiation shielding, and tool modules. It is a deep, systems-heavy mod, and getting the most from it means investing real time in its mechanics.

The mod is available for Forge and NeoForge, so it fits a range of modpacks and launchers. It currently supports Minecraft 1.20.1, 1.20.4, and 1.21.1, spanning the 1.20.1 to 1.21.1 releases. It runs on both the client and the server, so on a multiplayer server every player who connects needs it installed alongside the server itself.

Mekanism works particularly well alongside Applied Energistics 2, Thermal Foundation, and Just Enough Items. It targets the Forge side of the ecosystem, so it fits comfortably into Forge and NeoForge packs.

Being a content-rich mod, Mekanism adds machines, entities, or world features that can affect performance in very large bases, so pair it with optimisation mods if you run a big pack.

If you are comparing options, similar mods include Thermal Expansion and Immersive Engineering. They cover comparable ground, so the right choice usually comes down to your loader, version, and the rest of your pack.