As per site rules, you're expected to have no multiple wins, and to have activated all wins on your account.

Freshly revealed keys from Groupees, though they were from a bundle from late last year.

"Booming turbine noise, kerosene smells in the air and constant change and new challenges: The daily life of a large airport is perfectly presented and is a particular challenge in this professional and economic airport simulation.

Whether refueling super jumbos, or coordinating air traffic controllers and technical staff, or even organizing perfect catering: The Management of this airport will always have new challenges for you!
Features
The most detailed and comprehensive simulation of the events at an international airport
Many management and business options for the expansion of terminals and extension of runways
Countless missions and tasks that the player has to fulfill in order to guarantee a successful airport"