The big names, like the Mississippi River, the Missouri River, the Ohio River and the Colorado River, are only part of the game. Tributaries such as the Arkansas River, the Snake River, the Platte River and the Tennessee River have to be placed too, and the Susquehanna River and the Savannah River test your knowledge of the east. All 37 rivers come up in every game, with two minutes for the whole round and three attempts per question. Each wrong attempt costs points, and the time left at the end earns a bonus. A Flash version with only 10 rivers per round is also available.