Things that only games can do

“[There] are many games where what the player brings to the table is not “choice” of using a tiny set of verbs on a tiny set of largely irrelevant props, all aiming in the end towards the same predetermined authorial lesson. Systems can be designed for authorial imposition — Wordsworth’s or Horace’s intent to educate and illuminate — or for players to express, create, and even innovate. It is here where games like The Sims, Eve Online, Minecraft, Universalis, Dwarf Fortress, and even less “free” designs like Core Wars lie. And there is a case to be made that in that space are things that only games can do.”

Raph Koster, Interactivity