TIE interceptor is a less common sucessor of the TIE Fighter. Its bent wings gave it a manacing look of a dagger and provide the craft with extra power to its thrusters.
It was stronger than the original TIE Fighter, being equipped with 4 laser cannons, firing slightly faster than the X-Wing. Strangely, it is never featured in Empire at War. The question why Lucasarts added a TIE Scout, replacing the TIE Interceptor is still unanswered.