From today, Croatia is the 28th member state of the European Union. This change affects AirlineSim to that effect that the country is now also a member of the EU Treaty in-game. This means that - within the boundaries of the EU - any EU airline has full traffic rights in Croatia and any Croatian airline has full traffic rights in the EU.
Beyond that mere formality we want to celebrate the admittance, of course: When you buy credits within the next 24 hours, make sure to use voucher code WELCOMECROATIA and you get 30 free credits on top!