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