Twin Eagle is a NES game published by Romstar. It is a vertcial scrolling shooter in which the helicopter is player-controlled. The player needs to shoot enemy ships, turrets, helicopters and planes and earn points. During the game if certain buildings are destroyed, hostages are found and extra points are received for saving them.
The European version of the game contains a well-known Japanese-English mis-translation as the player is informed after losing all lives that "The player game is abortion". The NES version was based on the arcade game made by the Seta corporation a year earlier. The start screen is homage to the original.
Source: Wikipedia, "Twin Eagle", available under the CC-BY-SA License.