GNS theory is an informal field of study developed by Ron Edwards which attempts to create a unified theory of how role-playing games work. Focused on player behavior, in GNS theory participants in role-playing games organize their interactions around three categories of engagement: gamism, narrativism and simulationism.
The theory focuses on player interaction rather than statistics, encompassing game design beyond role-playing games. Analysis centers on how player behavior fits the above parameters of engagement and how these preferences shape the content and direction of a game. GNS theory is used by game designers to dissect the elements which attract players to certain types of games.
GNS theory was inspired by the Threefold Model, which was discussed on the rec.games.frp.advocacy USENET group in summer 1997. The Threefold Model defined drama, simulation and game as three paradigms of role-playing. The name "Threefold Model" was coined in a 1997 post by Mary Kuhner outlining the theory. Kuhner posited the theory's central ideas there, and John H. Kim later codified and expanded the discussion.
Now is the hour when we must say goodbye.
Soon you'll be sailing far across the sea.
While you're away, oh, PLEASE, remember me.
When you return, you'll find me waiting here.
Sunset glow fades in the west. Night o'er the valley is creeping.
Birds cuddle down in their nest, soon all the world will be sleeping.
Now is the hour when we must goodbye.
Soon you'll be sailing far across the sea.
While you're away, oh, PLEASE, remember me.