A free app for Android, by Classic Original.

Kontra is a first-person shooter game developed by Northern Arc. The game was originally released in 1987 and is available for Windows. The player controls two commandos named Bill and Lance. They must eliminate a terrorist group called the Red Falcon Organization that is planning to take over the Earth. In order to do this, they must go through various missions, fight various enemies, and get to the bottom of the Red Falcon Organization. Along the way, they will have to face many different enemies, including enemy soldiers, enemy bosses, and even alien enemies. They will have to use various weapons, such as rifles, shotguns, pistols, grenade launchers, and rocket launchers. In addition, they can also use a variety of different jump, move, and fire in eight different directions.