Here is the full list of all 15 Lighthouse of guiding flames achievements.
Unlock the whole gallery
Find the Keeper without a mask
Get dead end
Get all three endings
Get the ending of Resignation
Discover the special taste of scarlet tea
Look at Survival Lessons
Get the ending of the Fight
Sacrifice yourself for family
Get the Getaway Ending
Learn the story of an ancient deity
Watch out for the wind
Learn all the tea varieties
Get bad end
Start the game a second time from the beginning