Double Hawk is a shoot 'em up game for the Sega Master System. The basic premise of the game was that in the 1990s violence was spreading across the globe, brought forth by a group of terrorists. The protagonists, John Jackson and Jack Thomas, are sent into battle to eradicate all threats
The game consists of 5 missions, each with 4 levels ending in a boss fight. Throughout the game the player must eliminate various enemies including foot soldiers, armed vehicles, and helicopters using multiple guns and ordinance weapons. The player would have a time limit to eliminate these enemies. Various upgrades can be found in each level to facilitate game play.
Source: Wikipedia, "Double Hawk", available under the CC-BY-SA License.