From Glitch City Laboratories
A variety of unused maps exist in the game Harry Potter and the Chamber of Secrets for PC, accessible through Debug Mode. These are either maps used for cutscenes that are not normally navigable, or ones that were left completely unused in the game.
This is not an actual map on its own--rather, it is an inaccessible part of a used map. By roaming around in Free Camera Mode in the entrance to Hogwarts, one can find a section of the map where all of the human NPCs are stored.
Unescapable Potions Classroom
This, like the Character Gallery, is an unused part of a used map. It is simply most of the normal Potions Classroom, but it forms a rectangle shape from above with walls, blocking off where the entrance should be. It is just a placeholder for the cutscene after the player obtains the Bicorn Horn, as the normal Potions Classroom has no entrance to the room where the Bicorn Horn is obtained.
Hagrid's Hut Interior
There was to exist an interior of Hagrid's hut, though it was never finished. The map works fine, but there are no objects in the room, and it can only be accessed by going under Hagrid's hut rather than through the door.
17 Ch7Gryffindor (Gryffindor Challenge)
This is an unused map that, presumably, was going to be accessible through a door in the Gryffindor Common Room. This theory was formed because in Free Camera Mode the map appears right behind a door in the Gryffindor Common Room. This map has no unfinished parts, and even has its own music that is heard nowhere else in the game. It functions similarly to the other Challenges in the game, other than that no House Points are awarded and the player is not timed. Collecting Challenge Stars has no effect here, as after the Completion Star is obtained the player respawns in front of the Gryffindor Common Room.
18 Credits (Credits)
Entering this map makes the game's credits roll.
This is a map of the sky used in a cutscene of the game where the car is flying to Hogwarts. NPCs of Ron and Filch appear near the spawning point.