Here is the full list of all 15 Blood Knot achievements.
Find the fifth treasure letter.
Find the fourth treasure letter.
Take 10000 steps.
Defeat 50 enemies.
Loot 20 enemies.
Take 5000 steps.
Defeat 25 enemies.
Find the third treasure letter.
Take 3000 steps.
Defeat 10 enemies.
Take 1000 steps.
Find the second treasure letter.
Find the first treasure letter.
Acquire 1000 currency.
Possess all trailblazer equipments.