City Crisis
The first PS2 helicopter sim to make it the United States was "City Crisis." The game promises to give the player a chance to pilot a helicopter, and although it fulfills that promise, it doesn't accomplish much else. There is no plot to speak of and features are minimally implemented. That being said, game play can be enjoyable. The action focuses on rescue missions, such as rescuing people from a burning building and then spraying water on the fire. Other mission types include searching for criminals using a spotlight, a function that takes full advantage of both analog sticks surprisingly well.
Fireblade
The next and last PS2 helicopter sim to make it to the United States was "Fireblade." Reviews were considerably improved over "City Crisis." It has a plot, pitting you against a fictional terrorist organization. It has action, as your helicopter is mounted with weapons. And it is addictive. Its one major shortcoming is a poor control interface. "City Crisis" is actually easier and more natural to control, while "Fireblade" has more features and addictive game play.
Other Titles
Several other helicopter sims were released in Japan but not the United States. These include "Air Ranger 2," "ChopLifter," the "Operation Air Assault" series and "Puchi Copter 2." Since these games generally focus on action and visual interface, it isn't essential to know Japanese to enjoy them.