Here is the full list of all 24 Nusantara: Legend of The Winged Ones achievements.
You've arrived at a mysterious island!
What could this be?
Meeting your hero!
This guy looks suspicious...
Dangerous guy alert!
Awesome! You're not afraid to try something new!
A cute little gift from Mitra.
Isn't this a bit extreme...?
Reksa left without a word.
Find out about Rama's past.
He's... dead...?
Unlocked Mitra's kissing scene!
You found Liang Ndara Village!
There's a new kind of crystal?
The Goddess gave you a Pink Crystal.
Unlocked Reksa's kissing scene!
The Servants' true identities are...?
Give the explosives to Rama or Reksa.
Unlocked Mitra's Good End!
Unlocked Reksa's Bad End!
Unlocked Reksa's Good End!
Unlocked Rama's Bad End!
Unlocked Rama's Good End!
Unlocked Normal Ending!