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