The Mass Transit Add-on for Cities: Skylines has 10 trophies - 10 bronze.
Have 3 blimp lines
Have 10 blimp lines
Transport 5,000 passengers with cable cars
Transport 20,000 passengers with cable cars
Have 3 Ferry lines
Have 15 ferry lines
Have 3 Monorail lines
Have 10 Monorail lines
Have one Ferry and Bus Exchange Stop, Metro-Monorail-Train Hub, Monorail-Bus Hub and Multiplatform Train Station
Win all 3 Mass Transit Scenarios