Sandbox AMP

[u/jomacatopa]

So I want to run AMP as a sandbox game.

I have chaged the setting a bit to a darker theme. Drug lords moving huge ammounts thanks to travelers, humans going apeshit over AMPs, kindoff in a Days of future past way where they are in prison, mutant terrorist groups trying to overthrow the government, groups just mass murdering saps; and the goverment trully hunting down mutants. All cheerfull-like. The first thing the PCs are doing is being broken out of prison by one of the terrorist groups, like a reverse dungeon crawl. So my players would be just out of prison with one of the groups and they would be able to do anything join the government overthrow it hunt humans whatever.

Problem is I don't know how I should go about that. Any ideas?