Cities: Skylines - Mass Transit
Colossal Order has given the Cities: Skylines community yet another exciting expansion with Mass Transit. While the new content may not be available immediately in every way you play, it's worth it once you get there. How you get there is completely up to you, but might I recommend the blimp?
With all of the extras added in the various expansion packs, the game now feels a little more like a municipal engineer or municipal planner simulation than anything that properly depicts what it's like to be the mayor overseeing everything. Even with that caveat, Mass Transit adds more character and depth to what's already the premier city-building simulation.