Fetchr, also known as Bingo 5.0, is a custom gamemode in which you collect Minecraft items in a survival Minecraft world. You will be presented with a 5x5 Bingo board with each slot depicting a Minecraft item.
In the game lobby, this looks like this:
Fetchr or Minecraft Bingo in general is quite a simple concept as it builds on top of survival gameplay. You will start with an empty inventory at a random, and unknown spawn point within the world. You will need to punch trees, get a crafting table and basic tools, just like regular survival.