I can read in the manual that the active player plays first whenever there's a decision about who first resolves an action.
But in this case, what if many players have MULTIPLE cards that can be played? That is with the description 'play before a base scores'
Would each player have to play all the cards he wishes to play? Or could he play one, wait for others to decide what to play and then play the next?
It happened to me with I think the Cthulu faction, there's a minion that lets you draw a madness card for extra power; if you have played several it makes a huge diference since waiting for other players is what decides how many madness cards you'd get