Cities: Skylines is crossing over with Surviving Mars with some free DLC to celebrate the game’s third birthday.

With the announcement that game has sold a whopping 5 million copies on PC alone, Paradox are issuing some free DLC to celebrate the launch of their upcoming game, Surviving Mars.

 

The content will include a new Official Mars Radio station, an astronaut Chirper, as well as a new building called the Xchirp Launcher.

On top of that, if you already own Cities: Skylines on PC then you will get a 10% discount on Surviving Mars until March 30. That’s pretty reasonable.

The Surviving Mars DLC is available to download. Happy Birthday, Cities: Skylines!