Trench

You fly through a Star Wars style Death Star trench with gun emplacements firing at you from all directions. Enemy Tie fighters are also chasing you, trying to make you crash into the side of the trench or to make you leave the trench by flying too high. The only way to escape the enemy fighters is to try and dodge them. As you get closer to the vent your on-board attack computer is turned on, and once the vent is in sight, line up your sights over the opening and fire.