Everybody knows about the 404 challenge (and if you don't then you can look it up.) and this Minecraft Map that I have made is that challenge except for the fact that it is in the newest version of Minecraft.
4Don't use items from the surface except if you got them in the first 10 minutes of spawning in or a full Minecraft day.
5 Don't switch gamemodes.
6 After 1 Minecraft day you can never go to the surface AGAIN!
7 Have fun and don't hurt anybody irl if you die.
8 Don't make any torches except for Redstone torches.
How to play
1 When you first load in go get some wood as long as other resources.
2 When it becomes night go to the gravel area you spawned on and brake one of the Gravel blocks revealing a big cave. Then you just go into the cave and never leave!!
3 Get enough resources in the caves to go the the Nether.
4 Make a farm of some kind.
5 Just survive and thrive do what ever it takes to survive.