The French steelbook edition came with a plastic slipcover over the steelbook. It came with a card with DLC-codes.
1. Front of steelbook inside plastic slipcover
2. Back of steelbook inside plastic slipcover
3. Disc
4. DLC card
Thanks to eBay members aldibat (images 1-2) and warreclaud-2 (images 3-4).