I read and re-read the section in the rulebook, and spent a good 15 minutes looking through the forum trying to find an answer to this.
In the section where it outlines what happens during each player's turn, it lists the mythos phase as the last phase of that player's turn, and says that the first player performs the steps for the mythos phase.
My question is: Is this something that the first player does at the end of each player's turn, or something that he only does at the end of his turn?
I played my first full game with 2 other players last night, and from a read through the rules we agreed that the Mythos phase happens every turn. However, the game was so hard (with the 3 of us, potentially 3 portals were opening every full round) that I am starting to doubt this was the way the game was meant to be played, but then again it was the first game for all of us so maybe Cthulhu is just stomping us. But the wording is ambiguous, it just says the first player in italics performs the mythos phase, but not if this means it happens at the end of each player's turn or if it only happens at the end of the first player's turn.
Anyway, I would appreciate any answers on this issue for our next session that is coming soon.