"Metal Slug is a long running series that dates back to the Neo-Geo arcade machines. Few may know that Metal Slug XX is simply a re-mastered version of Metal Slug 7 on the DS. Now considering that game was released way back in '08. The game really does hold up a lot of its grit, but does it stand up to the rest in the series? Does it add enough value to a gamer to warrant a purchase for a side scrolling shooter?"