Since the original developer, DivoGames, no longer sells the game directly, it is often found on archival and legacy software sites:
AirStrike 3D: Operation W.A.T. : DivoGames - Internet Archive air-strike-3d-free-download-pc-game-full-version
AirStrike 3D: Operation W.A.T. (also known as Air Assault 3D) is a classic 2002 arcade helicopter shooter. Because it is older software, getting the "full version" to run on modern Windows (10/11) requires specific compatibility steps. Since the original developer, DivoGames, no longer sells
AirStrike 3D: Operation W.A.T. : DivoGames : Free Download, Borrow, and Streaming : Internet Archive. Internet Archive Since the original developer
AirStrike 3D: Operation W.A.T. : DivoGames - Internet Archive
You may also like * 3.8. Trial version. AirStrike II: Gulf Thunder. Assault a well guarded terrorist base. * Free. Air Assault 3D.