Here is the full list of all 30 Aritana and the Harpy's Feather achievements worth 1,000 gamerscore.
Find the Last Ritual.
Finish the game in the Hard Mode.
Survive the first encounter without losing health.
Make 100% of the game and watch the extended ending.
Get all the mountain Muiraquitãs.
Get all Muiraquitãs.
Make a combo using only Red Spirits.
Make a combo using the Strenght Boost.
Find all combos.
Conquer the Fire Staff.
Make 3 different combos without hitting the ground or getting hit.
Lose 3 health points trying to attack a Red Spirit.
Get all the cave Muiraquitãs.
Reach 99 lives.
Get all the forest Muiraquitãs.
Win the mountain battle against Mapinguari.
Survive the third encounter without using the Defense Ability.
Complete all the bonus stages.
Reach maximum health.
Win the cave battle against Mapinguari.
Survive the second encounter without letting any rock hit the ground.
Find 3 combos throughout the game.
Get 1.904 guaranás.
Kill one Red Spirit without using the Fire Staff.
Get hit by a Spirit right after it's respawn.
Win the forest battle against Mapinguari.
Fall 3 times into the water during the same level.
Offer 5 Muiraquitãs at the end of any level.
Stay in the air for one minute without hitting the ground or getting hit.
Make 7 different combos without hitting the ground or getting hit.