UNEP-DHI Eco Challenge Asian Final is the final round of the annual UNEP-DHI Eco Challenge. Winners of the national round of the UNEP-DHI Eco Challenge from countries in Asia will gather and compete to become the winner of the 2015 UNEP-DHI Eco Challenge. The competition involves teams of high school students from Asia Pacific, playing a serious game called Aqua Republica, where they play the role of a catchment manager overseeing the development of a catchment where they have to balance the use of water for agriculture, industries, ecosystems and cities.