This is D-Day: Dare You Re-Live It? for Atari ST.  It is complete in its box with all four game disks, the instruction manual, and registration card.  There is some wear, most notably in a tear on the back of the box and a small stain on the front, but everything is fully intact and the contents are in great shape.  The game is untested.

D-Day is an interesting wargame, with a bit more gameplay variety than commonly offered by the genre.  There is four modes in the game, each of which will appeal to different players:  there's Infantry, which is the game's RTS mode, requiring stealth and strategy, but there's also Bomb, where the player pilots a plane to bomb a bridge; Paratrooper, where multiple paratroopers need to be guided safely down, and Tank, which plays like a more modern take on Atari's Battlezone.  With its advanced polygonal graphics for its time and wealth of historical information, D-Day's a very enjoyable little title for those looking for something a bit different.