Stay underwater for one full day without using potions.

Place four Sea Pickles in one block.

Activate a Conduit.

Bribe a Dolphin.

Use a Dried Kelp block as fuel in a furnace.

Levitate up 50 blocks from the attacks of a Shulker.

Defeat an Elder Guardian.

Walk across the surface of a deep ocean by freezing the water with Frost Walker boots. 

Use the Totem of Undying to cheat death.

Defeat an Evoker.

Dye your bed a different color.

Lead a Caravan containing at least 5 Llamas.

Kill 2 players in a round of a public Battle mini game using a bow and arrow.

Win 3 rounds in a row after one of the opponents has won 2 rounds.

Push three Players into Lava using Snowballs.

Hit a Player with a Snowball while falling into the Lava.

Win a single round of Snowball Tumble without throwing any Snowballs.

Stay on the top layer while winning a round in a Snowball Tumble Mini Game.

Win a Tumble game whilst on the lowest layer in a Snowball Tumble Mini Game.

Hit a single Player with 25 Snowballs in a single public round.

Take 100 damage in a round of a public Battle mini game.

Kill a player while you are starving in a Battle mini game.

Win 3 public Battle games in a row.

Win a public Battle mini game.

Open every chest in a Battle mini game arena in one round.

Dry a Sponge in a Furnace.

Stay underwater for 2 minutes.

Poison a Witch with a Splash Potion.

Create and fully power a Beacon.

Kill the Wither.

Spawn the Wither.

Kill a Mob while wearing the same type of Mob Head.

Collect Dragon's Breath in a Glass Bottle.

Respawn the Enderdragon.

Power a Furnace with Lava.

Place a fully explored Map into an Item Frame.

Use an Elytra to fly through a 1 by 1 gap while moving faster than 40 m/s.

Teleport over 100 meters from a single throw of an Ender Pearl.

Tame a Horse.

Bounce 30 blocks upward off a Slime Block.

Dye all 4 unique pieces of Leather Armor.

Eat a Notch Apple.

Cure a Zombie Villager.

Craft and place a Sign.

Stop starvation using Rotten Flesh

Cook and eat a pork chop.

Use Shears to obtain wool from a sheep.

Gather all 16 colors of wool.

Tame an Ocelot.

Kill a Skeleton with an arrow from more than 50 meters.

Craft and place a Flower Pot.

Acquire diamonds with your iron tools.

Breed two cows with wheat.

Build some bookshelves to improve your enchantment table.

Construct an Enchantment Table.

Relieve a Blaze of its rod.

Brew a potion.

Mine or purchase 30 Emeralds.

Deal nine hearts of damage in a single hit.

Kill the Enderdragon.

Enter an End Portal.

Discover 17 of the 40 different biomes.

Throw diamonds at another player.

Swim in lava while having the Fire Resistance effect.

Smelt wood trunks using charcoal to make more charcoal.

Play a music disc in a Jukebox.

Create an Iron Golem.

Wear a full suit of Iron Armour.

Destroy a Ghast with a fireball.

Kill a creeper with arrows.

Play for 100 days.

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

Befriend five wolves.

Bake a cake using wheat, sugar, milk and eggs!

Catch and cook a fish!

Attack and destroy a monster.

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

Construct a Dispenser.

Turn wheat into bread.

Construct a Nether Portal.

Smelt an iron ingot.

Construct a better pickaxe.

Use planks and sticks to make a hoe.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Harvest some leather.

Construct a furnace out of eight cobblestone blocks.

Use planks and sticks to make a sword.

Use planks and sticks to make a pickaxe.

Punch a tree until the block of wood pops out.

Craft a workbench with four blocks of wooden planks.

Open your inventory.