If you bought GTA IV when new, or any prior GTA, perhaps you got special edition packaging, or just a deluxe packing by virtue of being timely and buying at the right outlet, say, instead of downloading from STEAM!?? hahaha
I uncovered, literally, the slip box for GTA IV that normally covers the plastic disc case, with it's own manuals, map and art slip-sheet. The cardboard slip over case has a fold out with even more art from Liberty City. I don't get out much, I missed this nice visual treatment since my GTA IV came in just the plastic box, perhaps it's the PC version only? Could be, but whatever the case, I put together a YouTube video showing it off, not uploaded just yet... but perhaps if it's not seen online easily, could see to scanning them in as well