Terraria

Chop down your first tree.

Build a house suitable enough for your first town NPC, such as the guide, to move into.

Obtain your first hammer via crafting or otherwise.

Mine your first nugget of ore with a pickaxe.

Discover and smash your first heart crystal underground.

Obtain an anvil made from iron or lead.

Discover a golden chest underground and take a peek at its contents.

Craft a mana crystal out of fallen stars, and consume it.

Equip your first grappling hook.

Defeat the Eye of Cthulhu, an ocular menace who only appears at night.

Using explosives or your trusty hammer, smash a Shadow Orb or Crimson Heart in the evil parts of your world.

Defeat the Eater of Worlds, a massive worm whom dwells in the corruption.

Defeat the Brain of Cthulhu, an enourmous demon brain which haunts the creeping crimson.

Discover a large bee's hive deep in the jungle.

Defeat the Queen Bee, the matriarch of the jungle hives.

Defeat Skeletron, the cursed guardian of the dungeon.

Steal a key from the dungeon's undead denizens, and unlock one of their precious golden chests.

Spelunk deep enough to reach the molten underworld.

Craft a molten pickaxe using the hottest of materials.

Defeat the Wall of Flesh, the master and core of the world who arises after a great, burning sacrifice.

Unleash the ancient spirits of light and darkness across your world, enabling much stronger foes and showering the world with dazzling treasures (and rainbows!).

Smash a demon or crimson altar with a powerful, holy hammer.

Mine a powerful ore that has been newly blessed upon your world.

Equip a pair of wings.

Obtain a boss-summoning item.

Defeat the three nocturnal mechanical menaces: the Twins, the Destroyer, and Skeletron Prime.

Craft a drax or pickaxe axe using hallowed bars, and the souls of the three mechanical bosses.

Mine chlorophyte, an organic ore found deep among the thickest of flora.

Consume a life fruit, which grows in the thick of subterranean jungle grass.

Defeat Plantera, the overgrown monstrosity of the jungle's depths.

Breach the impenetrable walls of the jungle temple.

Defeat Golem, the stone-faced ritualistic idol of the lihzahrd tribe.

Obtain a rare treasure from a difficult monster in the dungeon.

Unlock one of the dungeon's large, mysterious chests with a special key.

Defeat Duke Fishron, mutant terror of the sea.

Defeat the Ancient Cultist, fanatical leader of the dungeon coven.

Defeat the four celestial towers of the moon.

Defeat the Moon Lord.

Survive a blood moon, a nocturnal event where the rivers run red and monsters swarm aplenty.

Defeat King Slime, the lord of all things slimy.

Triumph over a goblin invasion, a ragtag regiment of crude, barbaric, pointy-eared warriors and their shadowflame sorcerers.

Triumph over a pirate invasion, a group of pillagers from the sea out for your booty... and your life!

Survive a solar eclipse, a day darker than night filled with creatures of horror.

Triumph over the frost legion, a festive family of maniacal snowman mobsters.

Triumph over a martian invasion, when beings from out of this world come to scramble your brains and probe you in uncomfortable places.

Reach the 15th wave of a pumpkin moon, where evil lurks among the autumn harvest.

Reach the 15th wave of a frost moon, where the festive season quickly degrades into madness.

Survive the slime rain, where gelatinous organisms fall from the sky in droves.

Have all possible town NPCs living in your world.

Fire a Bee Gun while wearing a full set of Bee Armor.