DRAGON QUEST BUILDERS: 100% Achievements Guide (+Detailed Challenge & Rooms Info)

Let’s hop right into it!
Detailed information such as rooms, challenges, recipes were added to the relevant achievement.
I did not add additional information to the achievements that are self-explanatory.
Due to the amount of information, it is best to navigate by jumping to the section that includes the details you’re looking for.

Credit goes to Dragon Quest Wiki for the following:
https://dragon-quest.org/wiki/List_of_room_recipes_in_Dragon_Quest_Builders
https://dragon-quest.org/wiki/List_of_accessories_in_Dragon_Quest_Builders
https://dragon-quest.org/wiki/List_of_challenges_in_Dragon_Quest_Builders

Cook and consume food from recipes obtained through the story.

Build blueprints obtained through the story.

Chapter 1: Cantlin
Dragon scale: Obtained from the Green Dragon in Hammerhood Heights. The dragon is northeast from the old fortress.

Featherfall footwear: Can be found in a chest inside the pyramid in the Damdara desert. In the lower floor, one of the walls is made of dirt and thus destroyable. The chest is found by exploring the hidden area.

Talaria: To get them, the builder needs to find the remains of a man inside a cave, and place a dirt block and a tombstone on top of his bones. The man’s ghost will then appear and gift them to the builder in gratitude. The exact location of the cave changes from savefile to savefile, but it’s always in a cave in the area around the ruined fortress in the Hammerhood Heights.

Chapter 2: Rimuldar
Dragon scale: Dropped by the Blue Dragon who guards the holyhock in the Holy Sanctum.

Featherfall footwear: They are located in a chest inside a locked room in the central area of the Prickly wilds.

Gold ring: The ring can be found in a chest at the roof of the tearwolves temple in the western side of the Prickly wilds.

Ring of clarity: The leader of the tearwolves temple will teach the Builder how to make Defuddle drops upon talking to them, and if they use one drop on the beast, it will reward the builder with a ring of clarity. Alternatively, it can be crafted.

Ring of criticality: It is inside a locked room in the west of the swamp in the Ancient Palace.

Chapter 3: Kol & Galenholm
Dragon scale: Dropped by the Green Dragon in the southmost part of the Bleak and Burning Badlands.

Featherfall footwear: At the roof of the tower in the north (east) area of the Island of Ice.

Gold ring: Buried seven blocks north and 33 blocks east from the largest cactus in the Bleak and Burning Badlands.

Ring of awakening: Dropped by a Cannibox in the prison where Barbella is kept in the Island of Lava.

Ring of criticality: Obtained as a gift from a Gigantes in the Island of Ice. She is south from the red teleportal. First the builder needs to destroy the fortress blocks the Gigantes can’t break with the help of Hela’s hammer, and then feed the cyclops some pancakes.

Ruby of protection: Dropped by a Cannibox near the prison where Barbella is kept in the Island of Lava, the Boss Troll needs to be defeated in order to access it.

Steel sabatons: In a chest in the prison near where Barbella is kept in the Island of Lava, protected by a Boss Troll.

Strength ring: A chest in the prison where Barbella is kept in the Island of Lava.

Chapter 4: Tantegel
Gold ring: Inside a chest hidden behind ash blocks inside the cave where the Diviner’s altar was.

Ring of criticality: In the dungeon south of Myrland’s camp, in the lowest floor. This dungeon also contains the cursed equipment.

Ruby of protection: In a chest inside Charlock Castle, guarded by a Red Dragon.

Steel sabatons: Inside the “New Tantegel Castle”, The chest next to the one containing the Banner of Hope contains them.

Strength ring: Recieved from The Princess after reclaiming the Banner of Hope.

Obtain 150 different items. Can build fire blades.
Build your base to level 5. Can build additional stone furniture.
Defeat the three dragons. Can build display stands.
Build a Cantlin garden. Can make Guard’s garb, Villager’s vesture, and Trader’s tunic.
Repair the hammerhood’s graveyard. Can build Featherfall footwear.

There are three dragons in the Cantlin area, all of which need to be defeated for the challenge:

Cantlin Plains: It can be found in the southmost area of the island, sleeping in a field of flowers.
Hammerhood Heights: this dragon can be found in the mountains behind the ruined fortress.
The Damdara Desert: the last dragon is located on the mountains, just east from the pyramid.
They can be defeated in any order, but all three need to be defeated in order to complete the challenge. If fighting them is too hard, players can take advantage of the false idols’s fire throwing mechanic and place them facing the dragons.

For the Cantlin Garden challenge, the builder needs to place the following items inside a room: bench, any flower (x10), any plant (x5), water block (x8), plumberry tree, and a brazier. There are a few things to take into consideration while aiming for this challenge: the room doesn’t need to be in the town of Cantlin, and can even be made in Terra Incognita; to get the plumberry tree, a plumberry seedling must be planted inside the confines of the base (or in Terra Incognita) and wait two days for the seedling to mature. If building the garden outside of town, it’s possible to build the room around an already matured tree; in case one wants to build the garden inside the town, one must consider how water works in Dragon Quest Builders, meaning a channel from an already existing water source is needed; and lastly, in that case, it’s also important to remember that water in Builders is only two blocks above rock bottom, so it’s likely the garden will need to be underground.

To repair the hammerhood’s graveyard, the builder must travel to The Damdara Desert and talk to the brownie there. He will teach them how to build stone memorials. Afterwards, the player needs to return to the Hammerhood Heights and visit the destroyed graveyard and place the needed memorials. Finishing this quest rewards the builders with a seed of life.

Obtain 200 different items. Can build gourmand’s girdles.
Build your base to level 5. Can build wooden furniture.
Repair the ruined roof. Can build roofing tiles.
Obtain the crown goowels. Can build water crystals.
Complete all of Thalamus’s puzzles. Can build meteorite bracers.

In order to repair the ruined roof, the builder needs to find the ruined manor deep in the mountains in the Prickly Wilds and place the provided roof tiles in their corresponding places. Finishing this challenge also unlocks the recipes for roof tiling, pitched tiling, outer corner tiling, and inner corner tiling.

To obtain the crown goowels, the player needs to fish a King Slime in the slime-shaped pond in the jungle south from the Ancient Palace, and defeat it.

The quest to complete all of Thalamus’s quizzes is the longest one, requiring solving a puzzle in each of the region’s islands.

Swamps of Sickness: Located in the southwestern part of the island, it requires the player to copy a room exactly as it is.
Prickly Wilds: The second puzzle, located just north from the ruined manor, is solved by planting a palm seedling in the marked earth block.
Ancient Palace: The third puzzle is located in a swamp behind the mountains behind the Ancient Palace, going east from it. It requires the builder to change the clock’s hour from 9 to 3.
Holy Sanctum: The last puzzle is located in an area in the south western side of the island, and requires the builder to place the blocks obtained as rewards in the previous three puzzles in their corresponding slots. Finishing this last puzzle grants the builder a Catholicon ring, which prevents all status ailments when equipped.

Obtain 200 different items. Can build talaria.
Build your base to level 5. Can build hardwood and timbered blocks.
Defeat all the boss trolls and gigantes. Can build forbidden furniture.
Complete the spectacular spa blueprint. Can build hot water crystals.
Discover the recipe for the lyre of slime immemorial Can build lyres of slime immemorial.

The challenge to defeat all the boss trolls and gigantes is very straightforward. While they can be defeated with normal weapons, its advised to use magic weapons and even cannons to attack them. Their locations are:

Bleak and Burning Badlands: A boss troll can be found in the desert, south from the base.
Island of Lava: Another boss troll lies in the prison where Barbella was kept captive, behind a stone gate. Cannons can help destroy the stone gate.
Island of Ice: A gigantes can be found in the northwest, over the mountains.
Galenholm Ruins: The second gigantes is in the snow fields that extend in the southeast from the teleportal.
The spectacular spa blueprint can be obtained in the ruins of Galenholm. It is located in a chest in a cave full of precious metal veins, south from the teleportal. The recipe for the fierce fountains required for the spectacular spa can be learnt in the north part of the Island of Lava. Help the girl who bathes in the hot water by blocking the troll’s view with a block, and she will reward you with the recipe.

The lyre of slime immemorial is a special item that allows players to switch the music from modern to retro, and viceversa. It can be found in the labyrinth located in the Island of Ice, north from the teleportal. Fill the slime-shaped hole with blue blocks, and the entrance to the maze will open. Blue temple blocks hint to the intended path to find the lyre. Once the lyre is obtained, it’s recipe can be used in any where in the game, even in earlier chapters.

Obtain 200 different items. Can build legendary items of Erdrick.
Build your base to level 4. Can build superior crafting stations.
Defeat the Dragonlord without wearing the legendary armour. Can build rings of criticality.
Show a verdant vision to a certain someone. Can build novelty items.
Find the sword of ruin Can build forbidden equipment.

The challenge Defeating the Dragonlord without wearing the legendary armour is a bit tricky in its wording. It actually requires the Auroral Armour and Hero’s Shield not being in the equipment bag when the second phase of the boss fights starts, meaning they can be used in the first phase as long as they are stashed away in the colossal coffer before defeating the humanoid form of Dragonlord. The Sword of Kings can be used in both battles, as using it or not does not effect this challenge.

Show a verdant vision to a certain someone: This sidequest requires exploring the four islands in chapter four, and finding four slimes who wait in rocky formations that resemble themselves and showing them what they ask for:

Land of Ash and Despair: A slime is on top of a big rock slime, south from the temporary camp. He wants to see a milkblossom, which can be obtained by a shovel after purifying bones.
Tantegel Moor: This time it’s a she-slime, waiting on the northwest area from the castle. She wants to see a daffodaisy, which can be obtained with a shovel after planting a bud that she-slimes can drop.
Patchwork Island: The third slime is a metal slime, who waits northwest from the red teleportal. He wants to see a coralily, which can be obtained with a shovel after planting a bud that drackies can drop.
The Dragonlord’s Island: A king slime is located in the southmost area, on top of a rocky structure that resembles a king slime. He wants to see a verdant vision. To obtain the vision, the builder must combine the other three slime’s visions and the flowers on a diviner’s altar. Giving him the verdant vision completes the challenge. He will give the player some gungerbread as a reward.
The sword of ruin and the rest of the cursed equipment can be found in the southeastern area of the Land of Ash and Despair, in the opposite end of the chapter’s starting location. This optional underground maze acts as the game’s sole dungeon, and it’s the home of some powerful foes. To advance in the cave, the player must defeat monsters to get keys and unlock doors. Aside from the cursed equipment, some rare items can be found in the dungeon. The sword of ruin is in the lowest level.

Congratulations on getting all the achievements!