The latest incarnation of Falcon is Falcon 4.0 allied force.
From the Lead Pursuit website:
Falcon 4.0: Allied Force
Based on the legendary Falcon 4.0 F-16 combat flightsimulator, Allied Force features extensive improvements in all areas including artificial intelligence, graphics, multiplayer, terrain and of course the stunning real time, fully dynamic campaign engine. There is also a brand new theater of operation, the
Balkans, in addition to revised campaigns for the Korean theater.
http://www.lead-pursuit.com/It can be purchased at stores or ordered online from the Lead Pursuit site.
Im not sure if it can be bought and downloaded online.
Regards
Sun