A dystopian setting can create opportunities for a different kind of roleplay. It can also challenge players to think more tactically than in your typical heroic fantasy game. To start you off on your hopeless path, here are some best dystopian TTRPGs. 

You step out of the ornithopter. The sun immediately warms your face. Sand lightly pelts your skin on any areas not covered. You could be here for any reason: A member of house Atreides (a family of well meaning strong proud folk) , an emissary from House Harkonnen (fighters and scoundrels), a spy from an unknown House, a representative of the Bene Gesserit (seers). Your reasons are yours. Your skills have not let you down. You pat your trusty knife and turn silently to your comrades. With small nods and skills of their own you head toward the metal city of Arrakeen ready to meet your destiny.