“The Frankfurt-based (Germany) indie games publisher Deck13 and indie games developer FourExo Entertainment, are today very glad and excited to announce that they have just released the “Metro & Planes” DLC for their city builder/economy sim Highrise City (the said DLC is available right now for PC via Steam and GOG).” – Jonas Ek, TGG.
Source: N4G PC Highrise City has just released its "Metro & Planes" DLC via Steam and GOG