There hasn’t been as much riverboat excitement on the Mississippi River since the nineteenth century, when these waters were crowded with these picturesque vessels. Ameristar’s 70,000 square-foot riverboat casino has brought nonstop action to Vicksburg, including almost 1,000 of the latest and most popular slot machines, 24 table games across two floors, a five-table poker room and variety of exquisite dining options.