My parents used to tell me about the war for power. Pegasi were tired of the unicorns running everything, so they attacked. The war was devastating. The earth ponies managed to escape underground, avoiding the chaos above. The Pegasi won eventually though it almost wiped out their species. Equestria was a wasteland which the earth ponies decided to try rebuilding. My name is Steel, I live in a town called Craterville and I have been given the task to protect the last unicorn in existence.
A ton of inspiration from The Last of Us by Naughtydog and the Fallout series by Bethesda games