Master Spirit Guide
Beat the game on Master difficulty.


Master unlocks after you've completed the game once and it is going to be a hell of a task for you to complete. The trash mobs will murder you, the mini-bosses will make you find religion, and the main bosses will turn you into a born-again Christian. This difficulty is not easy by any means, so you want to prepare yourself before jumping into it. The increase in difficulty from Expert to Master is quite a jump.

There is an exploit to unlock this achievement easily. I am linking a video guide for it.
https://www.youtube.com/watch?v=ODhj6Hf6TCs&t=22s

You will automatically get these achievements while playing through the story hence they are unmissable.

Found a Friend
Find the first Rot.



Haikyo
Discover the Village.



Into the Woods
Discover the Forest.



Hunter in the Forest
Learn the Bow Ability.



Taro's Fear
Find Taro's Knife Relic.



Taro's Love
Find Taro's Food Offering Relic.



Taro's Regret
Find Taro's Lantern Relic.



Spirit Guide
Defeat Corrupted Taro.



Harness Your Power
Learn the Bomb Ability.



The Open Range
Discover the Farm.



Adira's Love
Find Adira's Ox Relic.



Adira's Fear
Find Adira's Hammer Relic.



Adira's Regret
Find Adira's Village Heart Relic.



A Heavy Hammer
Defeat the Corrupted Woodsmith.



Crossing Over
Learn the Dash Ability.



Toshi's Fear
Find Toshi's Incense Relic.



Toshi's Love
Find Toshi's Village Crest Relic



Toshi's Regret
Find Toshi's Harpoon Relic.



The Lonely Path
Reach the Mountain Shrine.



A Leader Walks Alone
Defeat Corrupted Toshi.



Restore Balance
Defeat the Corrupted Rot God.

Can be done anytime throughout the game and easier to do while in the Trials as they can be replayed any number of times. Still I would suggest making a manual save after getting the dash move towards the end section of the game as there aren't many combat after finishing through the main game although the Trials would still be accessible.

Between the Eyes
Destroy a Shield Sticks without breaking its shield.


Shield Sticks are the enemies that carry big shields. Slow down time by aiming with the bow and shoot it in its head without breaking the shield.


Bow Master
Hit 3 enemies with a single Multi-shot.


First, you must buy the Upgrade “Bind Multishot”, which costs 200 Upgrade Points. Now throw a Rot at an enemy to bind this enemy, then shoot that same enemy with an arrow. This will make your arrows split up to hit multiple other nearby enemies. Make sure there are another 3 enemies around. The Ability preview video in the Upgrades Menu shows an example of how to do this.


Piercing Blow
Hit 3 Enemies with a single Rot Infused Arrow.


You'll need to upgrade your Bow with the Rot Upgrade before you can get this. When you have it, aim your bow and press <button> to add a little rot to your arrow. Damage 3 enemies but don't kill them and try to line up 3 enemies close together them hit them with the infused arrow.


Quick Draw
Hit 3 critical hit spots in 3 seconds.


The game will have some parts with red bomb enemies, you will get this achievement more easily against them, just shoot them before they explode.


Return to Sender
Destroy a Mage with its own bomb.


Wait until the Mage casts a red orb that homes in on you, that’s his “bomb”. What you must do is to press <parry> just before this red orb hits you, thus performing a parry and throwing the orb back at him. If the Mage dies from this you earn the trophy.


Sharpshooter
Destroy an enemy by shooting a Bomb out of the air.


After unlocking the bomb ability throw the bomb and shoot it while it’s flying in the air, before it sticks on to an enemy. After throwing it you can jump and aim to slow down time in mid-air. This makes it easier to hit the bomb. Killing the flying moths with this tactic is very easy.


Triple Tap
Destroy 3 enemies with a single dash attack.


This ach can be done after earning the dash attack towards the end of the game. Damage 3 enemies and try to keep them in close proximity and use the dash attack.


Triple Threat
Destroy 3 enemies with a single Parry.


Find 3 enemies and weaken them enough that they’ll die in one more hit. The bow is perfect for lowering their health. Then parry one of them when they are close together. The Parry deals damage over a small area so all 3 should die at once if they’re close enough together.


Weigh Them Down
Destroy a Moth enemy with a Bomb.


After unlocking the bomb ability throw it to one of the moth-type enemies (little flying creatures). The bomb will explode on its own after a few seconds, or you can shoot it to make it explode immediately. This will kill the moth and unlocks the trophy.


Rot Commander
Use 5 Rot Actions in a single combat.


During combat, you gain Rot points (those little yellow dots on the bottom left of your screen). When you have a full point, you can use your Rots to aid you in combat. Hold <L2> and press <up> on an enemy to distract them. You can also upgrade your Bow, Bombs, and Sword to become "rot infused". You will most probably get it naturally by end.

I would advise to do the collectables after finishing the main story, this will unlock the full map and the fast travel points on the map. Use the video linked here for collecting them.



Hat Collector
Collect 50 Rot Hats.



No Stone Unturned
Find all of the Rot.



Restoration Master
Restore all of the Flower Shrines.



The Last Stop
Deliver all Spirit Mail.



Zen Master
Meditate at all Meditation Spots.



Curse Collector
Open all Cursed Chests.



Good as New
Restore a Flower Shrine.


This will unlock while progressing through the main campaign.

Say Cheese
Capture a picture in Photo Mode


Although not a collectable, can be done anytime just open the photo mode and click a pic.


Skillful Spirit Guide
Unlock all ability upgrades.


By the end of the game you most probably won't have all the points needed to unlock all skills. You can get them easy by playing the new game+ for the Master difficulty or farm them in certain spots, here is such a spot for farming the points.