A-JAX (エー・ジャックス?) is a vertically scrolling shoot 'em up arcade game released by Konami in 1987. The game was also released on the home computer systems ZX Spectrum, Amstrad CPC and Commodore 64 in 1988 by Imagine Software under the name Typhoon, the one chosen for distribution outside Japan and on Sharp X68000 by SPS as "A-JAX" in its home country. The players control a "Tom Tiger" helicopter (Ah-64 Apache) in the 2D stages and later a "Jerry Mouse" (F-14D) fighter jet in the 3D stages, and shoot enemies in the air and bomb them on the ground, collecting power-ups and defeating bosses to advance levels.
The game takes place in a fictional 2007 where the Earth has been conquered by alien invaders. The player combats the occupation forces using vehicles under operation code named 'A-Jax' created to liberate the Earth. Gameplay is divided into two scrolling sections with two different vehicles, the first being a vertical scrolling section with the helicopter and a rail scrolling stage with the jet/space fighter. The game spans eight stages and extends are set to 30,000 and a second at 150,000 points.
During the helicopter segments, the player has access to four different weapons including the Vulcan, Bomb, 3-Way, Triple and Laser. Each weapon is available through their own specific pick-up icon. However, the helicopter can only equip one firing weapon at a time, with the Bomb being constant. The player also has access to "Options" which add additional firepower. The jet segments contrast highly from the helicopter segments in the complete lack of available power-ups and additional weapons beyond a machine gun and bomb.