The game's flow can be edited with the Scenario editor. The scenario is essentially a list of commands which execute in order to load various game components. The commands are explained in the following table:

Scenario Commands

Command	Description
NEW_GAME	This command defines where the "New Game" menu item takes the player. For example, if NEW_GAME 5 defines where selecting New Game → Episode 5 will take the player.
SAVE	This command prompts the user to save the game.
LOAD_SCENE	This command loads a particular script file.
PUZZLE_PHASE	This command starts a particular puzzle phase.
ROUTE_SELECT	This command starts a particular group selection.
STOP	This command stops the game. It is not actually used.
SAVE2	This command also prompts the user to save the game. The difference between this command and SAVE are unknown.
TOPICS	This command displays which topics the player has collected over the previous scene(s) following group selection.
COMPANION_SELECT	This loads a companion selection screen, allowing the player to select which Brigade member will accompany Haruhi during the puzzle phase.
PLAY_VIDEO	Plays a video; 0 plays the OP and 1 plays the ED.
NOP	Does nothing
UNKNOWN0B	This command is used but its function is currently unknown.
UNLOCK	Unlocks particular functionality. The exact mapping between the parameter specified and which functionality is unlocked is currently unknown.
END	Ends the scenario and returns to the title screen.

Editing

As with script commands, scenario commands can be added and removed with the + and garbage can buttons above the command list.

The entire scenario can be cleared using the rocket ship button. Individual commands can be edited (changing the command itself as well as its single parameter) in the editor panel to the right.