Here is the full list of all 41 Kena: Bridge of Spirits achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Unlock all ability upgrades.
Find all of the Rot.
Deliver all Spirit Mail.
Restore all of the Flower Shrines.
Collect 50 Rot Hats.
Meditate at all Meditation Spots.
Beat the game on Master difficulty.
Defeat the Corrupted Rot God.
Reach the Mountain Shrine.
Defeat Corrupted Toshi.
Find Toshi's Village Crest Relic.
Find Toshi's Incense Relic.
Open all Cursed Chests.
Find Toshi's Harpoon Relic.
Destroy 3 enemies with a single dash attack.
Learn the Dash Ability.
Defeat the Corrupted Woodsmith.
Find Adira's Village Heart Relic.
Find Adira's Hammer Relic.
Find Adira's Ox Relic.
Capture a picture in Photo Mode.
Discover the Farm.
Destroy an enemy by shooting a Bomb out of the air.
Destroy a Moth enemy with a Bomb.
Learn the Bomb Ability.
Defeat Corrupted Taro.
Find Taro's Lantern Relic.
Destroy a Mage with its own bomb.
Find Taro's Food Offering Relic.
Hit 3 enemies with a single Multi-shot.
Hit 3 Enemies with a single Rot Infused Arrow.
Hit 3 critical hit spots in 3 seconds.
Find Taro's Knife Relic.
Use 5 Rot Actions in a single combat.
Learn the Bow Ability.
Discover the Forest.
Restore a Flower Shrine.
Destroy 3 enemies with a single Parry.
Destroy a Shield Sticks without breaking its shield.
Discover the Village.
Find the first Rot.