Here is the full list of all 47 Hellenica achievements.
Unlock a new skill.
Read a glossary entry.
Visit the Agora at Athens.
Visit Anaxagoras' airship.
Visit the Acropolis at Athens.
Visit the Agora at Athens after the fall.
Visit Atlantis.
Visit Corinth.
Visit Crete, the pirate's stronghold.
Visit Egypt.
Visit Hades.
Visit the Isle of Circe.
Visit the Oracle at Delphi.
Visit Rhodes.
Visit Destroyed Rhodes.
Visit Sparta.
Visit Thebes.
Visit Cyrus' war camp.
Recruited Agesilaus.
Recruit the Jackal.
Recruit Makarios.
Recruit Nyx.
Recruit Pollux.
Recruit Xenophon.
Learn the story of Darius' fall.
Learn the full story of Lysithea.
See Scylax and Agesilaus' redemption.
Learn of the origin of Scylax's sword.
Complete all combat encounters.
Complete all hard objectives.
Unlock all party skills.
Get thrown in the Labyrinth.
Spring the trap in Egypt.
Help Scylax discover the True Fire.
Defeat Gaia.
Backstab an enemy with Diona or Nyx.
Damage an enemy using steam pipes on the battlefield.
Destroy five barrels or pots in one turn.
Kill an ally.
Shoot an enemy with Nephele's steambow with an extreme height advantage.
Use Diona's Bear Toss skill to toss Brasidas onto an enemy.
Push three enemies to their death in one combat encounter using Brasidas.
Affect three different characters with a single use of Scylax's blue-flame Cauterize.
Create a 5-bounce chain.
Rescue Brasidas from Circe.
Learn Makarios' Ship name.
Learn about the founding of the Theban Shadows.