Use Case: Start New Game
Actor: Player
Description: Player selects to start a new game by sending a message to the in-game secretary. The system verifies that the player really wants to abandon the current game, and then resets the player to a new game.

Use Case: Get Help
Actor: Player
Description: Player requests help by sending a message to the in-game secretary. The system responds with help on the requested topic. If no topic is given, the system responds with how to interact with the in-game secretary.

Use Case: Set Checkpoint
Actor: Player
Description: Player selects to set a checkpoint by sending a message to the in-game secretary. The system asks for a description of the checkpoint, stores the current game state along with the current time and the checkpoint description, and notifies the user that the checkpoint has been saved.

Use Case: List Checkpoints
Actor: Player
Description: Player sends a message to the in-game secretary and asks for a list of checkpoints. The system responds by listing all saved checkpoints, the save time, and the description.

Use Case: Restore checkpoint
Actor: Player
Description: Player selects to restore a checkpoint. The system lists saved checkpoints for the player, and the player selects one of them. The system verifies that the player really wants to abandon the current position in the game, andf then restores the player to the selected checkpoint.

Use Case: Enter Scene
Actor: Player
Description: Player asks which scenes are available. The system presents a list of available scenes. Player selects a scene. The system describes the scene. The system presents a menu of objects and characters that are available in the scene.

Use Case: Interact with Object
Actor: Player
Description: Player select an object in a scene or in their inventory. The system presents the possible interactions for that object. Player picks one interaction (and possibly provide interaction-specific options). The system executes the selected interaction and present the result.

Use Case: Interact with Character
Actor: Player
Description: Player selects a character to interact with in a scene. The system initiates a chat between the character and the player. The character starts by asking how they may be of service. The player types a question or a request, and the character answers. Player ends conversation.

Use Case: Notify Player
Actor: Player
Description: When (some) events occur, the system notifies the player with the help of the in-game secretary. The secretary sends a link to the notification object, and the player inspects the notification as per the "Interact with Object" use case.

Use Case: Inspect Inventory
Actor: Player
Description: Player chooses to inspect their current inventory. The inventory is a scene that is available everywhere, so this transitions into the "Enter Scene" use case with the scene already pre-selected.