Here is the full list of all 30 Apotheon achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Root out the assassins in the Acropolis.
Find all lockboxes on Olympus.
Access the sunken wreck of the Euphemia in the Sea.
Access the Gold Mine in the Sea.
Meet the Necromancer in Hades.
Access the Symposium of the Sun in Apollo's hall.
Access Apollo's nectar cellar.
Access the Hunter's Trove in the Forest.
Access the Secret Grove at the Shrine of the Nymphs.
Beat game on Olympian Difficulty
Acquire the powers from all twelve Olympian Gods.
Acquire the Thunderbolt of Zeus
Find all rare weapons on Olympus.
Aquire the Sandals of Hermes.
Access Kleio's gift in the Acropolis.
Aquire the Kantharos of Dionysus.
Acquire the Trident of Poseidon
Access the Merchant Stockpile in the Acropolis.
Acquire the Aegis of Athena
Aquire the Artifice of Hephaestus.
Acquire the Crest of Ares
Acquire the Lyre of Apollo
Aquire the Cestus of Aphrodite.
Acquire the Sheaf of Demeter
Access the Refugee stash in the Forest.
Access the Assassin Stash in the Swamps.
Access the Agora Armoury.
Acquire the Bow of Artemis
Access the Agora Market Scroll-keeper’s Office.
Ascend to Mount Olympus