Cities: Skylines' latest DLC 'Concerts' [Steam] is now available and there's also a big patch for the rest of the game.
The new DLC adds in:
- Festival management mechanics
- Festival policies
- Upgradable Festival Area
- Three animated Festival bands
- New Radio station
- Chirper Hat
On top of that, there's a patch for the main game as well as the other previous expansions. It's mainly a big bugfix patch, with a lot fixed to make the overall game better, but it also gave the Content Manager an overhaul.
The Content Manager is used for sorting through your Maps, Mods, Scenarios and more. They've added a bunch of sorting options for it, so for those with lots downloaded from the Steam Workshop it's a much nicer experience now.
See the full patch notes here.