Terraria’s 1.4.5 update introduced 22 brand-new achievements, many of which are tied to secret seeds, rare enemies, obscure mechanics, and late-game challenges. Some are incredibly simple, while others may take hours—or even an entire world—to complete.
This guide breaks down every new 1.4.5 achievement, explaining exact requirements, where players usually get stuck, and tips to unlock them faster.
If you’re aiming for 100% achievement completion, this is your one-stop reference.
Book Worm
Complete the Bestiary
This is by far the longest and most time-consuming achievement introduced in the 1.4.5 update.
To unlock Book Worm, you must fully complete the Bestiary, including:
- All enemies
- All critters
- All NPCs
- Rare and seed-specific entities
Tips to Speed It Up
- Use Battle Potions and Water Candles to increase spawn rates
- Summon Blood Moons whenever possible
- Spend time in biome-specific spawn areas
New Bestiary Entries Added in 1.4.5
If you already had 100% completion before the update, you’ll need these new entries:
- 117 – Pufferfish
Rare critter that spawns in the Ocean biome - 179 – Moss Zombie
Extremely rare enemy in Graveyard biomes
Spawn chance increases with negative luck (kill Ladybugs) - 182 – Statue (Enemy)
Not a furniture item
Spawns in Graveyard biomes, post-Skeletron, with negative luck - 255 – Orca
Hardmode enemy in the Ocean biome
Shares spawn rate with Sharks - 307 – Librarian Skeleton
Spawns in the Dungeon if bookshelves are nearby
Place books if needed - 314 – Water Bolt Mimic
Dungeon enemy requiring nearby bookshelves
The book does not need to be a Water Bolt
Some players prefer using a pre-completed Bestiary world to unlock this achievement instantly.
Boulder Lord
Prove your worth against the Moon Lord’s worst
Defeat Moon Lord in a getfixedboi (Zenith) world.
This achievement is challenging but manageable with preparation. If you’re struggling, Zenith Seed-specific guides and endgame loadouts help significantly.
Queen Machine
Defeated the combined form of the 3 mechanical giants
To unlock this achievement, defeat Mechdusa.
Mechdusa is a secret boss exclusive to the getfixedboi seed, summoned by combining:
- Mechanical Eye
- Mechanical Skull
- Mechanical Worm
You’ll typically unlock this naturally while pursuing Boulder Lord.
Rollin’ In Your Grave
Ride your coffin on rails
Craft a Coffin Minecart, equip it, and ride it on rails.
That’s it — one of the simplest achievements in the update.
Fear the Sun
Burn in daylight as a vampire
Requirements:
- Create a world using the seed:
whatahorriblenighttohaveacurse - Equip the Vampire Vanity Set
- Stand on the surface during daytime
Important restrictions:
- Do not equip accessories or mounts that prevent burning
- Do not stand in water
- Umbrellas also prevent burning — avoid them
You’ll unlock the achievement once burning begins.
It’s Shaling Outside
Survive a rain of boulders
Conditions required:
- World uses both fortheworthy + 05162020 seeds
- It must be storming
- You must be on the surface
If all conditions are met, a boulder rain event will eventually begin.
The achievement unlocks after the boulder rain ends.
Extra Life
Die as a hardcore character… and survive
Steps:
- Create a Hardcore character
- Use a world with celebrationmk10 + constant seed combo
- Die
After revival:
- Your HP is reduced by 60%
- Example: 100 HP → 40 HP
Achievement unlocks immediately after revival.
Grave Mistake
‘Accidentally’ kill someone with your tombstone
Only works in Zenith (getfixedboi) worlds.
When you die, your tombstone is launched as a projectile.
If it kills:
- Another player or
- An NPC
The achievement unlocks.
Spicy Licks
Jam out on a six-stringed instrument
Use any of the following instruments:
- Ivy – Dropped by Steampunker
- Rain Song – Dropped by Flying Fish
- Stellar Tune – Dropped by Empress of Light
- The Axe – Dropped by Plantera
Simply equip and use one.
Organized Chaos
Find the Rod of Discord
Obtain the Rod of Discord, dropped by Chaos Elementals at an extremely low rate.
Tip:
If RNG is not on your side, this achievement can be unlocked using an All Items world.
On Fleek
Spot the sun on a ‘cool’ day
- Wear Sunglasses
- Stand on the surface
- During daytime
Sunglasses are crafted using two Black Lenses.
Fortune Favors the Bould
Discover a friendly boulder
Break a Star Boulder.
Easy Method
Use seed:
2.4.1.64.2046115747
Alternatively:
- Craft a Star Boulder using:
- 1 Boulder
- 50 Fallen Stars
- Use a Crystal Ball
- Place it, then break it
Training Day
Make villagers combat-ready
Use both:
- Advanced Combat Techniques
(Fishing during a Blood Moon) - Advanced Combat Techniques: Volume Two
(Throw a Spell Tome into Shimmer)
Mini-Me
Become a Moon Lord impersonator
Equip the full Moon Lord Set:
- Head/Mask – Dropped by Moon Lord
- Chest – Golden Lock Boxes (fortheworthy seed only)
- Legs – Chests in 05162020 or getfixedboi worlds
Terrarist
Scare villagers with a stink bug sword
Hit any NPC using the Flymeal Sword.
New Digs
Give a villager a makeover
Soak any NPC in Shimmer to change their appearance.
My People Need Me
One-way trip to space
In a getfixedboi world:
- Reach space
- Die there
Achievement unlocks on death.
Going Oldschool
Restore the classic title screen
From the main menu:
- Click the sun or moon
- The title screen and music change
Arguably the easiest achievement in the entire update.
Sea You Later
Craft the ultimate Cell Phone
Craft the Shell Phone, the final upgrade in the Cell Phone progression.
Conservationist
Plant 100 acorns
Plant 100 acorns on grass.
No tricks — just time.
Interdimensional Recycling
Give the Dryad a Joja Cola
Steps:
- Hold Joja Cola in your hotbar
- Talk to the Dryad
- A special dialogue option appears
- Select it
Rewards:
- Junimo pet
- Achievement unlock
Conclusion
Those are all 22 new achievements added in Terraria’s 1.4.5 update. Some test patience, others test knowledge of secret seeds, but together they add a solid layer of late-game content for completionists.
If you’re chasing 100% completion, bookmark this guide — you’ll need it.
Sea ya later. 🌊😉
