You can play Gapple Ultra-Hardcore by adding the server in the Minecraft launcher.

On Minecraft Java Edition, open the Minecraft launcher. Click “Multiplayer” and then “Add Server” and enter the Gapple Ultra-Hardcore IP Address gapple.duckmc.net in the “Server Address”. Then press “Done” and start playing.

For Minecraft Java Edition, the Gapple Ultra-Hardcore IP is gapple.duckmc.net.

To join Gapple Ultra-Hardcore, follow the instructions on how to play above.

In Gapple Ultra-Hardcore, you can play Hardcore.

To vote for Gapple Ultra-Hardcore, click the vote button at the top of the page. Then enter your Minecraft username and click “Vote”.

The website for Gapple Ultra-Hardcore is https://www.planetminecraft.com/forums/minecraft/servers/open-uhc-server-590441/.