The goal to get off of fossil fuels by the year 2050 has failed. The world has become extremely hot. The rising ocean levels have displaced most of humanity. The constant struggle for control sea water desalination plants has become a prime concern for the military.
The future military is mostly made up of combat mecha. Since burning more fuel is only making the problem worse, the military is judged harshly on its efficient use of fuel. At the UN council, Dr. Gilolamo has advocated murdering 90% of the human population as a solution to the worlds problems. Unknown to the council, he has raised an army to do this. You are part of an elite fighting force that is tasked with eliminating this threat and using your fuel allocation as efficiently as possible.