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