All features of this datapack are described in detail on it's official wiki! A beginner guide is also available.

Requirements

This datapack requires a resource pack to load its custom textures! Link: https://modrinth.com/project/ultra-hardcore-resource-pack

Optifine is required for the custom mob textures to load! (You can still play the datapack without the mod, but the new mobs won't have custom textures) Link: https://optifine.net/home

Features:

• expanded progression system (flint, copper, steel & blaze gold tier),
• expanded survival systems (wounds, nutrition, health scaling, frost, hydration & sanity),
• new mobs & mob difficulty scaling,
• stronger Wither & Ender Dragon,
• new armor & tools,
• new foods,
• all stews are now stackable,
• 2 new utility blocks for forging,
• some structures,
• changes to farming,
• and more!

Game design

While the player must overcome many new obstacles in the early game, they become easier to manage as the player progresses. The post ending experience remains mostly the same.

All obstacles introduced by the datapack can be easily managed in the late game. For example, hydration is essentially auto-managed when the player obtains a hydrating helmet.

This datapack is highly configurable! Almost any feature you don't like can be disabled.