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Old Beacon by zr2

Make beacon great again

Old Guns Mod by Zach2039

Old guns for that colonial feel!

Old Java Warning by Darkhax

Warns about old Java..

Old Obsidian by legobmw99

Re-add the old obsidian generation behavior with redstone wire

Old-School Hunger by Elucent

Restores the hunger system from before Minecraft Beta 1.8.

OldBlocksMod

This adds a few old blocks to minecraft!

OldBookRecipe

This is an example mod

OldFlowers

Another update

OldRemovedFeatures-1.12.2 by SillyMan0108, MCreator

Readds old features

Oldowan Obsidian by Gyro

Some tweaks to obsidian.

OliveCraft by Joserichi

OliveCraft adds olive stuff like olive oil or edible olives to Minecraft.

Olympia by DasUmlaut

Olympia Project Core