ModsFinder

Infinity Cave

by Frozytime

Infinity Cave is a world generation mod that lowers the world floor from -64 to -128 and fills the new depth with a single connected cave system.

FabricForgeNeoForgeQuiltServer required, client optionalGNU Lesser General Public License v3.0 onlyOpen source1.20.1 – 26.2

What it does

Below the bedrock layer the mod generates a very large cave network that links up into one continuous system. It adds five new cave biomes and extends the Deep Dark biome, so six biomes can be explored in total, and each one holds at least one structure. Regular vanilla mobs do not spawn in these caves; a custom spawning system takes their place and is considered difficult, so the mod's own notes recommend a gentler difficulty setting on a first playthrough.

The mod is built for later stages of a world and uses roguelike-style progression. Mobs come in five tiers, from Common up to Legendary, each with randomized stats and a random offhand item. Higher tiers only appear after lower ones are defeated, and progress is tracked as a group, so friends playing together advance together. Legendary mobs carry their own boss bar and a random element. The mod is published for Fabric, Forge, NeoForge and Quilt, with builds covering 1.20.1 – 26.2. It is released under the GNU Lesser General Public License v3.0 only and is open source. Only the server needs it; players may join without installing it.

Key features

  1. Connected cave network

    The cave system below the bedrock layer forms one continuous area rather than separate pockets.

  2. Five new cave biomes

    Five added cave biomes and new parts of the Deep Dark biome bring the total explorable biomes to six.

  3. Tiered custom mobs

    Mobs are grouped into five tiers, and each mob gets randomized stats and a random offhand item.

  4. Custom items and weapons

    Custom weapons and armor with special abilities drop from Legendary mobs, and Enchantlets add enchantments not available in vanilla.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
26.x2 of 2 versions with builds
26.20.92Not available0.92Not available
26.1.20.9Not available0.9Not available
1.21.x12 of 12 versions with builds
1.21.110.88.2Not available0.88.2Not available
1.21.100.87Not available0.87Not available
1.21.90.87Not available0.87Not available
1.21.80.85Not available0.85Not available
1.21.70.85Not availableNot availableNot available
1.21.60.85Not availableNot availableNot available
1.21.50.72Not available0.72Not available
1.21.40.7Not available0.7Not available
1.21.30.7Not available0.7Not available
1.21.20.7Not available0.7Not available
1.21.10.70.60.7Not available
1.210.610.60.61Not available
1.20.x4 of 4 versions with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Late-game exploration

Players who have finished the surface game can descend into the deeper caves for a harder challenge.

Group progression

Friends playing on the same server share progress points and advance through the tiers together.

Who it’s for: Players who want a difficult, roguelike-style cave challenge in a late-game world, and server owners who want custom content below the vanilla world floor.

How it compares

Full comparison

Subsurface is open source under the Apache License 2.0, covers 1.20 – 26.2 on all four loaders, and is needed on the server, with the client optional. Amethyst Caves is not open source, released under the Creative Commons Attribution Non Commercial 4.0 license for 1.21.5 only, and is needed on the server, with the client optional. Both add caves, but neither changes the world height or adds a custom mob spawning system.

ModLoadersGame versionsEnvironmentUpdated
Infinity CaveFabric, Forge, NeoForge and Quilt1.20.1 – 26.2Server required, client optional2026-08-23
SubsurfaceFabric, Forge, NeoForge and Quilt1.20 – 26.2Server required, client optional2026-06-23
Amethyst CavesFabric, Forge, NeoForge and Quilt1.21.5Server required, client optional2025-04-06

Questions

Does Infinity Cave need to be installed on the client?

No. Only the server needs it, so players may join without installing the mod.

Which loaders support Infinity Cave?

Fabric, Forge, NeoForge and Quilt all have files, and the mod is also available as a data pack for server platforms.

Is Infinity Cave suitable for a first playthrough?

The mod's own notes suggest a gentler difficulty setting the first time, because the custom mob spawning system is considerably harder than vanilla mobs.

In the catalog

Infinity Cave is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.

World generation mods8,515Fabric modsMods for 26.213,894

More from Frozytime

All projects
Mine Treasure1.18.2 – 26.3A Breach Happened1.21.10 – 26.2Talentium1.20 – 26.2

Similar mods

Biomes O' Plenty1.7.10 – 26.3Cobblemon1.19.2 – 1.21.1Terralith1.18.2 – 26.3YUNG's Better Nether Fortresses1.18.2 – 26.1.2Dungeons and Taverns1.19 – 26.3Yeetus Experimentus1.18.2 – 26.3

What the author says

Infinity Cave changes the world height from -64 to -128 and adds a new type of cave generation where it all interconnects into an absurdly giant cave system. There are 5 new cave biomes and additions to the Deep Dark biome, making it possible to explore 6 different biomes. Each biome has at least 1 structure with the…
Frozytime, on the Modrinth page

Official listing

Owner
Frozytime
Published
2023-12-16
Updated on Modrinth
2026-08-23
Facts verified
2026-10-15

Tags

AdventureMobsWorld generation
Open on ModrinthCompare