Greek Mythology, also referred to as ‘Classical Mythology’, is the mythology of the ancient Greeks.
The term ‘Classical Mythology’ is used to also include the Romans. Though I’ve never heard about anything that is explicitly Roman. Everything I’ve heard is focused around the Greeks.
Appleseed has very surface-level references to Greek Mythology…mostly by borrowing names. Basically every name originates from Greek Mythology.
Vampire: The Requiem includes super antagonists called the ‘Strix’ which are originally derived from a Roman vampiric owl creature…thing. I think.
There are almost certainly more derivations from Greek Mythology, I just don’t know what they all are.
There’s also Promethean: The Created which references Greek Mythology with the name. But I don’t know if there’s anything else of note there.
The goddess arc of Kami Nomi zo Shiru Sekai makes the references to Greek Mythology. The goddesses are named after deities from Greek and Roman Mythology. Though I’m not sure if there are any more overt references. I might notice later.
There are definitely some references to Greek Mythology in Persona, but I won’t bother looking into it until later.
Toaru Project probably has some references to Greek Mythology, though I can’t remember any. I’d find it strange if there were none at all.
Then again, Toaru is more concerned with Science, Abrahamic religion and esotericism.
Warcraft’s dryad is pretty obvious and…that’s all I can think of.
There’s a game-line called ‘Orpheus’ though I know nothing about it. I’m just mentioning it.