In a post apocalyptic scenario people managed to survive and found enough food to live on the edge. Some of them started growing colonies to revive humanity after a long period of starvation. Also the need for entertainment after a hard working day starts to rise. So people started to patch up old military drones for street battles or as companions for long distance explorations.
Inspired by the tv show Robot Wars and games/movies/books like Fallout, Rage, The Surge, Metro2033 and Mad Max.