The online climate game CEO2 from World Wide Fund for Nature and Allianz is a rather complex simulation that allows one player to run a company over a period of 20 years. Players can chose from four industries (automobile, chemicals, insurance, utility). The player must then make decisions to reduce the CO2 and maintain (and increase) the company’s value. They have a limited budget and can chose from a variety of business decision like investing in smart grids or carbon capture and storage (utility). Their target is to reduce CO2 emissions significantly until 2030 without going bankrupt. Advisors (environmentalist, investors, researcher) offer help but their suggestions can be one-sided. The game is based on the RECIPE study from the Potsdam Institute for Climate Impact Research.