Bring your cattle to Abilene, Kansas, in 1870. Hope that your opponents get only your sick cows. If they get another one, then there is the time for a shootout between your cowboys. The player who manages to bring the most herds to Abilene (and earns the most money) wins.
The original Hexagames edition supports only 3 players. The Schmidt Spiele edition supports up to 6 players.