Here is the full list of all 29 Eternal Hope achievements.
Befriend Heli.
Collect an adventurous soul.
Collect your first soul.
Collect a coward soul.
Save your girlfriend from the Shadow World.
Destroy Heliel's heart.
Enter the Temple of Souls
Meet the Charon.
See Heli's true form.
Meet your first Umbra.
Enter the Forgotten City.
Collect a corrupted soul.
Collect a condemned soul.
Collect a legendary soul.
Meet the trickster.
Be saved by the hedgehog.
Come face-to-face with a troll.
Collect a pure soul.
Collect a weak soul.
Collect a heroic soul.
Save the hedgehog.
Enter the Dark Forest.
Meet the ancient turtle.
Collect a brave soul.
Collect the first soul fragment.
Meet your first An'mu.
Meet Heli.
Meet the girl in the cliff.
Start a new game.