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.
Once again, help to repair Gambler.
Fully repair Gambler.
Defeat Henriette again.
Defeat Elsom.
Continue to assist in the repair of Gambler.
Defeat Vek.
Bring a third part to Gambler.
Reach level 30.
Help to repair Gambler again.
Defeat Dolly.
Help to repair Gambler.
Defeat Henriette...
Heal yourself many times.
Defeat many enemies.
Defeat Kika.
Arrive at the crash site.
Defeat Old Singer.
Defeat Kellunhelk.
Obtain many modules.
Obtain many weapons.
Locate many Big Bots.
Obtain many Healing Cores.
Visit The Cut Machine.
Spend time with Pasha.
Find Charley.
Get to know Saymund.
Say goodbye to Mutt.
Get to know the crew.
Have a chat with Relic.
Help Gili.
Receive a special gift from Molly.
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.