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