Alabaster: An Interactive Experiment - Tag-lined title
As with Short's earlier magnum opus Galatea, the most significant gameplay elements here are conversational in nature, the outcome of dialogue exchanges changing the moods of the characters and revealing new knowledge that informs the possible navigation and (minimal) inventory-manipulation options at the player's disposal. Extraordinary verbs furthering this unusual gameplay include TOPICS, which proposes conversational threads to pursue, and THINK, which tabulates the sum of the knowledge thus far achieved through the conversations completed. Upon game completion, the player can also invoke the ENDINGS command to reveal which game conclusions have thus far been achieved -- some of which require more knowledge (derived from more conversation) than others.
A further feature of the game is its dynamic illustration engine, collaging picture elements automatically depending on the characters' moods.