The Snow Queen

This game, an adaptation of Hans Christian Andersen's 1845 faerie tale Sneedronningen, puts the player alternatingly in control of the story's two protagonists, little girl Gerda and her friend the little boy Kay in an attempt to reunite them from dangerously wintery mutual alienation. The game author has made a formal exercise in structure by alternating interfaces between episodes and their respective protagonists, Gerda interacting with the game world as per a conventional early text adventure game and Kay selecting options Choose-Your-Own-Adventure style from a list.