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