How do you get the siren related achievement? It's the only one I'm missing. I thought it was by standing still when the creature from the abyss talks to you, but that just makes me die to the abyss, not the sirens. I really have no idea where to even start looking for them....

How to you get to throw a "perfect" discus throw? I've gotten a last throw right in the center of the circle, as well as all 9 circles aligned, but still no achievement.

Is it one at a time or all at once?

May be I'm dumb, but how do you leave the island with a head? You need to go to the start point, or just go to the end of the map?

When Hermes says "Great throws" specifically, the game softlocks, this has only happened while attempting the discus throws a second time.