payoff(s) -- challenge(s) / game(s) / math(s) / reading(s) 
_ .. / common(s) / idea(s) / change(s) / theme(s) / _ / .
war(s) / mission(s) / theme(s) / move(s) / topic(s)
create / media / art / game / story / design / dilemma(s)
play
/ social(s)
/ machine(s)
/ method(s)
/ cycle(s)
