Action Half Life 2 is designed to simulate the experience of being in an Action movie. Movies like Hard Boiled, Face Off, and Die Hard are the inspiration for AHL. AHL2 is AHL reborn on Source engine.
This is a great game. Period. A remake of the original that does it right. Pace, gameplay, and overall design is just all spot on. The stunts make it a unique experience. Give it a try!