|The Big Model|
You've got a character - floating there in a void, represented only by your character sheet. The game has a setting - huge, sprawling, detailed.
In play, however, your and the others' characters are located somewhere in that setting, interacting with the features and individuals right then and there.
The Situation of play is exactly that: this narrowing of focus right upon the characters' circumstances and points of view, an extreme specification of their general or abstractct identities as created entities and of the setting's broader scope.
In other words, you don't really play your characters, full stop, but rather, you play your characters in a, specifically this situation.
in media res
assignment; including Mission-based play
pressure; including Blood Opera
Dynamic interaction between specific characters and small-scale setting elements; Situations are divided into scenes. A component of Exploration, considered to be the "central node" linking Character and Setting, and which changes according to System. See also Kicker, Bang, and Challenge.