From Swicked Softworks:
3D Blitz challenges you to defend a WW2 allied forces base from enemy attack by air and sea. As enemy planes and ships are picked up on radar, you must locate and destroy them before they destroy you!
The trial version is free to download and play and allows the player 5 free uses to enjoy the full version of 3D Blitz.
3D Blitz is powered by a 3D real-time physics based engine and features advanced enemy AI, high resolution graphics, superb sound effects, and intense game play.