Cities: Skylines has launched a free Match Day DLC giving players the ability to build major sports stadiums in their cities and manage everything which comes with such a venue.
Colosseum Order: Build a stadium in your city and become the home of a major sports franchise
Read the Match Notes: Prepare for increased traffic coming to and from your arena on match day – and reap the rewards from ticket revenue
Team Workshop: Customize your local team colors and enact new stadium-related policies
In addition, Paradox and developer Colossal Order have released a new patch which unlocks five custom in-game items for all players which had previously only been available with pre-orders: Carousel, Dog Park, Bouncy Castle, Basketball Court, and Botanical Garden.