Construct a Nether Portal.

Construct a furnace out of eight cobblestone blocks.

Punch a tree until the block of wood pops out.

Construct a better pickaxe.

Acquire diamonds with your iron tools.

Catch and cook a fish!

Mine 1,728 Cobblestone and place it in a chest.

Craft a workbench with four blocks of wooden planks.

Use a hopper to move an item from a chest minecart to a chest. [Bedrock Only]

Attack and destroy a monster.

Smelt an iron ingot.

Travel by minecart to a point at least 500m in a single direction from where you started.

Play for 100 days.