This is the Home Run Derby portion of MLB The Show cut out of the full game and sold to you with 4 trophies. There really is not much gameplay to review as the only goal of the entire game is to hit home runs. If you're buying this game for trophies; its great and the the full list [3 Gold trophies and 1 Bronze] can be unlocked in less than 2 minutes. If you're buying it for gameplay I'd recommend buying the full game which is only a few dollars more in a used game bin at a local store since that offers the full game.
Overall this is a great purchase for trophy hunters and will quickly boost your level in a just a couple minutes (literally).