Destroy a Ghast with a fireball.

Craft and place a Flower Pot.

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Discover a Shipwreck.

Find an underwater ruin.

Discover 17 of 40 biomes.

Swim in lava while having the Fire Resistance effect.

Gather all 16 colours of wool.

Acquire 30 Emeralds by trading with villagers or mining.

Construct a Nether Portal.

Construct an Enchantment Table.

Turn wheat into bread.

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