Hello there!

I've made a nice & simple datapack for Ultra Hardcore (UHC)!

((I Plan on making a video covering everything in this soon))

UPDATE OCTOBER 13, 2019:

- Fixed time updates to display to @a instead of @p
- Changed setup to be used in the load tag, so all setup for the game will be done upon using /reload
- Added joinGame, startGame, and endGame triggers so you don't need op to do the join_game, start, and reset functions

Features:

• Worldborder centered at 0, 0
• Solo Only (I plan on making a team version soon)
• 2001 block sized worldborder that shrinks to 11 blocks over 1 or 2 hours
• Timer that sends a time update every 20 minutes
• Spectator support, anyone who hasn't joined the game is put in spectator mode on start
• Natural regeneration automatically turned off
• Spreadplayers max range 1000 blocks (to Worldborder) and 100 block minimum between players

How to Use:

• Install datapack in [​World]/datapacks folder
• Use /reload in the world
• To join the game, type '/trigger joinGame'
• To start game, type '/trigger startGame' to start a 1 hour game, or '/trigger startGame set 2' for a 2 hour game.
• To reset the game, type '/trigger endGame'. This well reset the worldborder to Minecraft's default, turn natural regen on, and remove everyone from the 'Players' team.

Thanks for reading/using!

If you have any suggestions or issues, let me know!