It's the 56° mission in chronological order of the RDR2 story mode, played with protagonist Arthur Morgan .
Urban Pleasures - Mission Details:
After receiving a tip from Bronte about a trolley station in Saint Denis holding a large amount of cash, Dutch, Arthur and Lenny meet to rob it.
Gold Medal Objectives (100%)
The following are the Mission Objectives required to obtain the Gold Medal in the mission "Urban Pleasures":
- Rob all the customers in the trolley station
- Kill 10 lawmen while on the trolley
- Prevent any lawmen jumping on the back of the wagon
- Shoot the dynamite Lenny throws
- Complete the mission without taking any health items
Note: You must complete all Gold Medal requirements in one single playthrough of the mission.