Aquaquest (2005)

"Aquaquest is situated in an imaginary world with a central mountain and six countries. Each player is leader of one of the countries. Each country has a large lake, two rivers that are shared with other countries and a sea. There are two kinds of water tokens in the game: blue for clean water and brown for dirty water. The goal of each player is to get the water situation in the country right, which means there is no dirty water in the country and there are exactly six clean water tokens in the lake. Water flows from the mountain to the sea. Also hovering clouds evaporate water or rain down water on the land, depending on weather conditions. The game has three levels, increasing in complexity but also making the game less random. "