DieTogether

Die Together is a Paper plugin for Minecraft 1.20+ where all players share one fate: if one player dies, everyone dies.

This plugin is perfect for hardcore mode, but it also works in normal survival.

How it works? Every time a player takes damage, it is displayed in chat. Scoreboard in right side of screen is showing A scoreboard on the right side shows the current HP of players. If one player dies, all players die together. Supports Hardcore and Survival game modes.

In Hardcore mode, after death you should delete the world folder if you want to restart.