Minecraft but you need to kill 1 mob every minute or you will die (you don't need to reload)
This datapack is the hardest that I have made

Tips for a gameplay:

1. You won't see the number of kills you have, but you shouldn't need it
2. If you want to see the number of kills use the command:
/scoreboard objectives setdisplay sidebar kills
3. Always have a bed in hand (if you know you will die just set your spwanpoint)
4. It will also work to snowmen and iron golem (:
5. The nether will be a pain
6. In the end you can place water and then kill enderman

HAVE FUN!

if you want to suppoert my channel (:
https://www.youtube.com/channel/UCtbhIRdOf_t92pJVKh-vw7Q/featured

Here a tutorial on how to use datapcks
https://www.youtube.com/watch?v=KNxcgGpnn8Q&t=1s