If you want to run a pregenerated campaign then Shadowrun Missions is great.Season 1: SR3 campaign set in Seattle. 14 runs. Free.Season 2: SR4, has 25 runs set in Denver. Free.Season 3: SR4, has 12 runs and is set in New York, Only the first one is free.Season 4: SR4, has 2 runs and more on the way. It's also set in Seattle but none of them are free.