Seven: Papa & Yo
Papa & Yo is inextricably tied to Journey in my mind, both PS3 exclusives, both downloadable, both ostensibly puzzle-platformers, both literary in their goals, and both released a few weeks apart from one another. I give the slight nod to Papa & Yo because I find its explicit, painful parable of an alcoholic's child coming to terms with his father's disease to be even more powerful, especially when tied to its game mechanics. So many games are believed to be power fantasies—Papa & Yo shows that they're also powerlessness fantasies.