Most games entertain. A rare few do something harder: they move the line of what the medium is allowed to be. They arrive, and afterward the rules are different — for designers, for players, for the culture that grows around them.
What makes a game generation-defining is not its sales or its scores. It is the size of the door it opens.
The ones that changed the verbs
Every era has a title that introduces a new verb. Before, you could not really explore a world; then you could, and open worlds became a genre. Before, you could not build inside a game the way you build in life; then you could, and a generation of children learned systems-thinking with a pickaxe. The defining games are the ones that hand you a new way to act, not just a new place to look.
The ones that changed the feeling
Others move the line emotionally. They prove a game can make you grieve, or wait, or sit with discomfort — that interactivity can do something film and books cannot, because you are the one who pressed the button. Once a game makes a million people feel something they did not know a game could make them feel, the medium never shrinks back.
Why it matters now
Gaming is the largest entertainment industry on earth, and yet it is still young enough that single works can redraw its borders. That is the thrill of covering it: any year, a studio you have barely heard of can ship something that makes the whole form feel new again.
At Droid, those are the games we chase — not the biggest, but the ones that change what "a game" means.