The ice caps have melted. Continents have been reduced to a handful of islands. Survivors seek to rebuild what is known as the Floodlands.
That is the premise of a video game released this year that represents a new approach developers are taking: using games to educate players on climate change, and what might happen if they fail to rein it in.
In an earlier game, Eco, the land is still vibrant and human society is growing. Eventually, an asteroid strikes, but the inhabitants do not know that yet.