Because official support has ended, some argue FC2 is "abandonware." However, legally speaking, it is not. The copyright remains with Eagle Dynamics. Searching for a "free activation key generator" is dangerous. These tools are almost universally malware, keyloggers, or scams designed to steal your passwords.
Here is the hard truth for veterans: Do not waste time hunting for an FC2 key. Buy Flaming Cliffs 3.
If you want, I can provide:
(Invoking related search suggestions.)
As a flight simmer, I understand the nostalgia. You want the exact flight model you mastered in 2011. You want the old Su-27 avionics, not the new PFM (Professional Flight Model) that is harder to fly. flaming cliffs 2 activation key
However, you must accept that Flaming Cliffs 3 in DCS World is objectively superior. The graphics engine is modern, the multiplayer servers are populated (unlike the dead FC2 multiplayer), and you get access to the massive Caucasus map updates.
You cannot buy a new key from the developer. However, you have three legitimate avenues: Because official support has ended, some argue FC2
On Steam
On GOG
Manually Activating an Existing Key
If you already own the key from a previous purchase: