It's a map of the world in Command & Conquer 3 Tiberium Wars, the third game (technically fourth if you count expansions) in the Command & Conquer Tiberium series.
The series is based around a meteor landing in Italy along the River Tiber and bringing an alien mineral to earth that gets named Tiberium due to the river it landed in. Tiberium is apparently able to grow by assimilating organic matter and crystalising it. However the mineral is also invasive and incredibly toxic to native terrestrial life. As it grows it also either kills or mutates the local life, leaving parts of the world barren wastelands of Tiberium deposits with the exception of hostile mutated lifeforms.
Apparently it also serves as a relatively inexpensive and near infinte power source so the world does promote its growth in areas so they can harvest it and it becomes responsible for a new scientific revolution.
Then along comes a cult called the Brotherhood of Nod. They worship Tiberium, believe it will accelerate humanity to the next stage in its development both physically and spiritually and attack people who try to regulate or contain it. They're lead by a charismatic demagogue called Kane who believes he is the Messiah of this new world and apparently cannot be killed (it is revealed he is an alien which upset a lot of fans).
In response the UN founds the Global Defence Initiative or GDI which eventually supplants the world militaries altogether as Tiberium spreads and renders nation-states defunct.
This map is set in the mid-21st Century when Tiberium growth has spun out of control. Red Zones are areas of intense contamination where there is nothing but enormous deposits of Tiberium (Ice Age glacier size). Yellow Zones are less contaminated but also possess the majority of the human population and are in a state of social collapse and decay. They are also Nod's primary strongholds. Blue Zones are the GDI's strongholds, are free of Tiberium contamination and have achieved a state of near post-scarcity standard of living.
Then the third game begins and you have to fight the Third Tiberium War.