Here is the full list of all 42 Ghost Song achievements.
Complete the game without dying.
Finish the game in under 3 hours.
Get to know Saymund.
Help your friends escape.
Complete the game on Original difficulty.
Defeat a Big Bot.
Obtain many weapons.
Obtain many modules.
Do a killer Painwheel juggle.
Push the large piece of junk down the hill.
Obtain many Healing Cores.
Destroy many Roslock creatures in the pit.
Visit The Cut Machine.
Defeat Old Singer.
Show off with flowers.
Find Charley.
Have a chat with Relic.
Get to know the crew.
Receive a special gift from Molly.
Once again, help to repair Gambler.
Fully repair Gambler.
Defeat Elsom.
Locate many Big Bots.
Defeat Henriette again.
Heal yourself many times.
Say goodbye to Mutt.
Continue to assist in the repair of Gambler.
Reach Mabec.
Defeat Vek.
Reach level 30.
Spend time with Pasha.
Help Gili.
Bring a third part to Gambler.
Help to repair Gambler again.
Defeat many enemies.
Defeat Dolly.
Help to repair Gambler.
Destroy many innocent creatures.
Defeat Kellunhelk.
Defeat Henriette...
Defeat Kika.
Arrive at the crash site.