One of the four stances in the Narrative Stance Model. This refers to the view of the game from within the inside of the game world and its reality, usually from within the mind of a player character living within that reality. The player is thinking as the character -- he doesn't acknowledge Out-of-Character (OOC) information and tries to concentrate on what the character is experiencing.

This stance is closely related to the Author stance within Stance Theory.

References:

1. Kevin Hardwick's "Narrative and Style" (rgfa)
2. Sarah Kahn's "Reiterating the Narrative Stances" (rgfa)
3. John Kim's rgfa FAQ, Part 0
4. Neel Krishnaswami's rgfa Glossary