Sigma Mod

Players can expect a broad set of additions: over 40 advancements, new blocks and items, two new mobs, several potion effects, a rare biome called Weeping Woods with weeping trees and a new weeping wood type in an indigo colour, plus three new dimensions named Radiance Layer, Dark Place and Liminal Abyss. The music discs come with their own generated music.

The block set includes a new wood type with two new sets of stairs, slabs, walls and similar decorative blocks. Two creative-mode-only mobs, Radiance Slime and Darksand Zombie, are part of the additions. The mod also introduces two fluids: Crude Oil, which is very viscous and pulls entities toward its centre like quicksand without dealing damage or destroying items, and Engine Oil, the least viscous fluid in the mod, which does neither.

The mod is published for NeoForge only, with files for 1.21.8 and 26.1.2 as the latest release. A server running it needs every connecting player to have it too. The code is not open source, and the author holds All rights reserved over the mod. The author notes that it is not built to strain systems and that it works well alongside More Stuff, a companion mod the author recommends, though Sigma Mod does not require other mods to run.