Here is the full list of all 42 Ghost Song achievements.
Help your friends escape.
Complete the game on Original difficulty.
Defeat a Big Bot.
Heal yourself many times.
Find Charley.
Receive a special gift from Molly.
Once again, help to repair Gambler.
Fully repair Gambler.
Reach level 30.
Defeat Vek.
Visit The Cut Machine.
Have a chat with Relic.
Continue to assist in the repair of Gambler.
Defeat Henriette again.
Bring a third part to Gambler.
Obtain many Healing Cores.
Defeat many enemies.
Help to repair Gambler again.
Help to repair Gambler.
Defeat Henriette...
Defeat Kika.
Defeat Dolly.
Arrive at the crash site.
Defeat Elsom.
Defeat Old Singer.
Defeat Kellunhelk.
Obtain many modules.
Obtain many weapons.
Locate many Big Bots.
Spend time with Pasha.
Get to know Saymund.
Say goodbye to Mutt.
Get to know the crew.
Help Gili.
Reach Mabec.
Destroy many Roslock creatures in the pit.
Do a killer Painwheel juggle.
Destroy many innocent creatures.
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.