Agent USA is an educational action-adventure game released for MS-DOS in 1984 by Tom Snyder Productions. In the game, players assume the role of a secret agent tasked with stopping a viral outbreak caused by the evil "Fuzzbomb." Traveling across a map of the United States by train, players collect crystals to build resistance and cure infected cities. The game teaches geography and problem-solving, combining fast-paced gameplay with an educational twist.