Here is the full list of all 13 Rainy City: Pandemic achievements.
Make your first delivery in Rainy City.
Make your first delivery in the Quarantine Zone.
Meet all of Betty's customers.
Collect 10 return packages in a game.
Collect 50 packages in one game.
Deliver to Lucy 3 times in one game.
Talk with each customer 3 times in a single game.
Beat the game on Normal.
Beat the game on Hard.
Find and talk to Cinderella in the big city.
Find and talk to Corey Savage.
Find and talk to the developers.
Find and talk to Nexus.