Friday I defeated the Shai-Gen's last general and started after the final boss, Wang. It annoyed me to discover that I needed a four-star agility rating to reach Wang's rooftop garden, particularly since I'd already climbed halfway there. I spent the rest of my game time grinding that rating by sniping thugs from a rooftop and finding agility orbs.
Saturday I took on Wang and beat him. I found a rocket launcher useful for this. Either a Firefly or Hothead will do. Tip: Don't lock on to the bad guys, shoot the ceiling above them. Then I beat the final crime, and the game treated me to its mildly plot-twisting cutscene.
Next, I quit the campaign, respawned the gangs, and re-entered. I have two achievements I'd like to make before I put the game on the play-again-someday shelf. I'd like to scale the agency tower, and max out all the skills. The first does not require a gang respawn, but the second does. Skills for kills, agent; skills for kills.