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