Admiral Zheng He: Sailing Alone is a small, solitaire expansion for Admiral Zheng He consisting of just 18 cards and 4 pages of rules, much of it historical background. You as a Trader must contend against three other Traders who play effectively, but using simple rules. You must also contend, for the first time with Pirates and Ambushes, that can arise at particular ports without notice. Voyager beware! You can even add these events to the multi-player game if you wish. -description from the publisher