Terraria’s 1.4.5 update didn’t just add small tweaks or quality-of-life changes. It quietly dropped one of the strangest, most seed-dependent batches of achievements the game has ever seen. A lot of these aren’t things you unlock naturally just by playing. Some require very specific worlds, others force you into bizarre situations, and a few are straight-up time sinks meant to test patience more than skill.
Terraria 1.4.5 New Achievements Guide (February 2026)
This Terraria 1.4.5 New Achievements Guide walks through every new achievement added in 1.4.5, explaining not only what to do, but what actually makes each one annoying, confusing, or unexpectedly easy once you know the trick.
Book Worm
This is the longest grind in the entire update, and there’s no shortcut around it. Completing the Bestiary means fully registering every enemy, critter, NPC, and rare spawn in the game. Some entries fill quickly, others take dozens of encounters, and a few seem allergic to spawning when you need them.
Boosting spawn rates becomes essential. Water Candles, Battle Potions, and Blood Moons all help stack encounters faster. You will also need to jump between biomes, difficulties, and sometimes world states just to force certain enemies to appear. This achievement doesn’t test skill, it tests commitment. Expect this to be your final unlock.
Boulder Lord
This one sounds dramatic, and it kind of is. You need to defeat the Moon Lord inside a getfixedboi world, which completely reshuffles how Terraria behaves. Gravity flips, progression feels cursed, and familiar fights suddenly feel wrong.
The Moon Lord himself isn’t radically different, but the environment absolutely is. If you’ve never played a Zenith-style seed before, expect frustration. Preparation matters more than raw damage here. Once the Moon Lord finally drops, the achievement pops immediately.
Queen Machine
If Boulder Lord is your warm-up, this is the real spectacle. Mechdusa is a secret boss formed by combining the three mechanical bosses into one fight. It only exists in getfixedboi worlds, and it’s exactly as chaotic as it sounds.
The summons merge into a single item, and when used, you face a fused monstrosity that attacks relentlessly. Most players unlock this achievement naturally while hunting Boulder Lord, since both require the same type of world. If you survive the fight, the achievement is guaranteed.
Rollin’ In Your Grave
This is a short, slightly goofy achievement. You need to craft the Coffin Minecart, equip it, and actually ride it on rails. That’s it.
As long as you have access to rails and the materials for the minecart, this one takes less than a minute. It exists mostly as flavor rather than challenge.
Fear The Sun
This achievement is extremely specific and easy to mess up if you miss a detail. You must create a world using the “whatahorriblenighttohaveacurse” seed, equip the Vampire Vanity Set, and stand on the surface during daytime.
The moment your character begins burning from sunlight, the achievement unlocks. Accessories that negate sunlight damage, mounts, umbrellas, or even standing in water will prevent it from triggering, so remove everything and stand exposed. It feels unintuitive, but once it clicks, it’s instant.
It’s Shaling Outside
This one is pure chaos. You need a world created using both the “fortheworthy” and “05162020” seeds combined. While in that world, you must be on the surface during a storm.
Eventually, the sky starts raining boulders. Not meteorites. Actual boulders. You don’t need to survive the rain, only witness it fully. Once the storm ends and the boulder rain stops, the achievement unlocks. Standing somewhere safe is highly recommended.
Extra Life
This achievement plays with Terraria’s hardcore rules in a strange way. You must create a hardcore character and use it in a world generated with both the “celebrationmk10” and “constant” seeds.
After dying, instead of the character being permanently deleted, they revive with severely reduced health. The achievement unlocks the moment this happens. It’s unintuitive because hardcore characters normally don’t come back, which is exactly why this achievement exists.
Grave Mistake
This is one of the darker joke achievements. In a Zenith-style seed, tombstones become deadly projectiles. When a player dies, their tombstone flies forward and can actually deal damage.
If that tombstone kills another player or even an NPC, the achievement unlocks. It’s easiest to do this intentionally in multiplayer or near crowded NPC housing. Timing matters, but it doesn’t take long once you know how tombstones behave in these seeds.
Spicy Licks
This achievement is all about music-themed weapons. You need to obtain and use any one of several guitar-like items in the game. Simply swinging or activating the instrument is enough.
Different weapons come from very different sources, ranging from bosses to common enemies, so most players will stumble into this naturally at some point during progression. Once you use the weapon, the achievement triggers instantly.
Organized Chaos
This one is classic Terraria pain. You must obtain the Rod of Discord, one of the rarest drops in the game. Chaos Elementals are the only source, and even then the drop chance is brutal.
There’s no trick here, just farming. Long underground hallow sessions are inevitable unless you use a Journey Mode workaround or an all-items world. When it finally drops, the achievement unlocks immediately, no usage required.
On Fleek
This achievement is refreshingly simple. Craft Sunglasses using Black Lenses, wear them, stand on the surface during the day, and look at the sun.
That’s it. No hidden mechanics, no seed requirements, no danger. It’s one of the easiest achievements in the update and a nice break from the madness.
Fortune Favors the Bould
This achievement revolves around the Star Boulder, a rare and oddly friendly object. Breaking one unlocks the achievement.
You can hunt naturally, but the fastest method is using a known seed where one spawns early. Alternatively, you can craft a Star Boulder yourself using a Boulder and Fallen Stars at a Crystal Ball. Place it, mine it, and the achievement unlocks instantly.
Training Day
Here you need to fully prepare your town for combat. That means using both volumes of Advanced Combat Techniques.
The first book comes from fishing during a Blood Moon. The second is obtained by tossing a Spell Tome into Shimmer. Once both are used, the achievement unlocks. It’s more about knowing where these items come from than any real difficulty.
Mini-Me
This is a cosmetic-focused achievement that requires assembling the full Moon Lord outfit. Each piece comes from a different source and often different world seeds.
Once all pieces are equipped together, the achievement triggers. It’s less about fighting and more about scavenger-hunting specific conditions.
Terrarist
This one feels almost mean-spirited. You need to hit an NPC with the Flymeal sword. That’s all.
The NPC doesn’t need to die. One hit is enough. The achievement unlocks immediately and mostly exists for humor.
New Digs
Shimmer continues to be one of the strangest mechanics in modern Terraria. For this achievement, simply force any NPC into Shimmer so their appearance changes.
Once the transformation occurs, the achievement pops. It’s quick, simple, and hard to mess up.
My People Need Me
In a getfixedboi world, reach outer space and die there. The environment itself is what matters, not the cause of death.
Once your character dies in space within that seed, the achievement unlocks. It’s short, slightly dramatic, and fits the theme of the update perfectly.
Going Oldschool
This is arguably the easiest achievement in the entire update. On the main menu, click the sun or moon until the title screen and music revert to the classic style.
The achievement unlocks immediately, no gameplay required.
Sea You Later
This achievement is tied to progression. You need to craft the Shell Phone, which is the final upgrade of the Cell Phone line.
If you’ve ever completed the Cell Phone before, you already know how painful this crafting tree can be. Once the Shell Phone is crafted, the achievement unlocks automatically.
Trash Compactor
This one is exclusive to Journey Mode. You need to research half of all items in the game.
It’s a long-term achievement unless you import a character with extensive research already completed. Once you hit the 50 percent threshold, the achievement triggers instantly.
Conservationist
Plant 100 acorns on grass. That’s it.
It doesn’t matter where, how fast, or in which biome. Once the counter hits 100, the achievement unlocks. It’s simple and surprisingly relaxing.
Interdimensional Recycling
This is a crossover-style achievement. Hold Joja Cola in your hotbar and speak to the Dryad.
A special dialogue option appears. Selecting it rewards a Junimo pet and unlocks the achievement. It’s one of the more charming surprises in the update.
Terraria 1.4.5 achievements are less about skill checks and more about experimentation, secret seeds, and knowing how deep the game’s systems really go. Some of these feel like developer jokes, others like love letters to long-time players who enjoy breaking the rules.