The image posted is a generic case that can have any number of various things printed on it. So it is not either a PlayStation nor Metal Gear item. It is a Blockbuster item.
The two options I can think of for an item such as this.
- When you add the game into your collection, you use the notes field to indicate it has that case.
- Allow the case itself to be added to the databse, however as a generic item. Not as a Metal Gear Solid - PlayStation case, but as a Blockbuster keep case or "Blockbuster PlayStation Games to Rent case (blue)" or [EU] at the end. This item would not go into the typical platform category, but into the Other or perhaps into a swag category... if we consider this item to be more like those steelbooks you can get on their own.
If the item is to be put into the db, then the description must state the origin of the item, and the game title, address and other text is printed to specifically reflect the contents, and that the ELPSA rating (in this case anyways, Blockbuster US did not use ESRB label on their rentals) will be different.
Then, in the notes of adding this item to the collection, you can put "Metal Gear Solid" as the game inside.
That is my initial thoughts, see what you guys think or if you have any other ideas.