Fate of the World is the sequel to Climate Challenge. It is a simulation of the social and environmental impact of global climate change over the next 200 years. The player is placed at the helm of GEO (Global Environment Organization), an independent organization founded in 2020 to intervene when the decisions of individual nations start to pose global threats, especially to the environment. Through six main areas of focus - long-term development projects, environment, technology, energy, welfare, and politics, the GEO manifests itself worldwide with the permission of individual nations and continents to determine Earth's future.
Just like the first game, the player's decisions consist mainly of choosing and drawing cards from different decks. With starting funds, agents can be recruited worldwide to establish a presence in a nation or continent. Each agent can hold a card chosen by the player. Focusing on energy for instance, the player can choose to commit to nuclear or protect land, soil, and forests. After the agents are recruited and the cards are chosen, the turn is ended and the game fast-forwards five years to show the effects. These are visible through newsflashes about the amount of available oil, the rise of sea levels, extinct animals, political unrest, global warming, and many more statistics. Cards need to be paid for. Some only last a single turn and open up new cards, while others have an infinite influence. After each round new funds are gathered based on the chosen strategy.
The game contains four main scenarios: The Rise of Africa, Fuel Crisis, Three Degrees, and Dr. Apocalypse. Scenarios, with the exception of the first, may be unlocked by completing a previous scenario. They each contain specific win and lose conditions and only a limited amount of time is available. Winning is not necessarily done through peacekeeping and an optimal environmental strategy. Sacrifices can be made through military interventions, clandestine operations, and dangerous environmental policies when this furthers economical growth. Each card can lead to very different results and constant adaptation to current events is required to meet the win conditions. In later years, new technologies are researched and these are offered as new cards to choose a new strategy.
The game contains an accurate climate model based on the research of Oxford University professor Myles Allen.