Steel Gunner/Gameplay

Controls

 * Lightgun: Use the lightgun to move the gunsight of Garcia (or Cliff if you're player 2) around the screen. Squeeze the trigger to fire your character's machine gun, and press the button on the side to make your character launch a missile, which will injure (or kill) all enemies currently on the screen.
 * 1 or 2 Player Buttons: Push these buttons to begin the game as player 1 or player 2.

Garcia and Cliff
These Neo Arc police officers are the protagonists of the game; they are on a mission to save the well-known authority on physics, Dr. Ryan, and his assistant, Dr. Ellis, from the radical terrorist army known as STURM (but it is not known what the letters stand for). They must progress along a predefined path through each of the game's four acts and possess the power to shoot anything on the screen including the background objects and innocent bystanders - but just like how they will lose energy, if they should get shot by any of the enemies, they will also lose energy if they accidentally shoot a bystander (that is also indicated by the bystanders collapsing and shouting "Ouch!" or something similar). When they are low on energy, the text "WARNING" will appear over their life bar, and a warning sound effect will start to be heard from the C140; however, they will regain energy (and gain additional missiles, as they only start out with four) at the end of all except the final act, depending on how accurate their shooting was.

Innocent Bystanders
There are ten different types of innocent bystanders to watch out for; whenever one runs into view, the text of "DON'T SHOOT!" will appear above them. If you accidentally shoot one, you will lose some of your energy as if you had been hit by an enemy (again, it will also be indicated by them collapsing and shouting "Ouch!" or something similar) - and this means that if you accidentally shoot one of them while you are low on energy, it could end up costing you the game. However, they are all smaller than the enemies, so should be easy to avoid.

Enemies

 * [[File:SN Zaku.gif]] Zaku
 * [[File:SN Domu.gif]] Domu
 * [[File:SN Gufu.gif]] Gufu
 * [[File:SN Spider.gif]] Spider
 * [[File:SN Biker Zaku.gif]] Biker Zaku
 * [[File:SN Mosquito.gif]] Mosquito
 * [[File:SN Pod.gif]] Pod
 * [[File:SN Mobile Armour.gif]] Mobile Armour
 * [[File:SN Enormous Cannon.gif]] Enormous Cannon
 * [[File:SN Missile Gun.gif]] Missile Gun
 * [[File:SN Beam Gun 1.gif]] Beam Gun 1
 * [[File:SN Beam Gun 2.gif]] Beam Gun 2
 * [[File:SN Beam Gun 3.gif]] Beam Gun 3
 * [[File:SN Zaku A4.gif]] Zaku (Act 4)
 * [[File:SN Domu A4.gif]] Domu (Act 4)
 * [[File:SN Biker Zaku A4.gif]] Biker Zaku (Act 4)
 * [[File:SN Spider A4.gif]] Spider (Act 4)
 * [[File:SN Mobile Armour A4.gif]] Mobile Armour (Act 4)

Bosses

 * [[File:SN Green Falcon.gif]] Green Falcon - The first boss of the first act.
 * [[File:SN Hart.gif]] Hart - The second boss of the first act.
 * [[File:SN Aggai.gif]] Aggai - The boss of the second act.
 * [[File:SN Zugoku.gif]] Zugoku - The boss of the third act.
 * [[File:SN Green Zugoku.gif]] Green Zugoku - The first boss of the fourth act.
 * [[File:SN Enormous Weapon Ryushiferu.gif]] Enormous Weapon Ryushiferu - The second boss of the fourth act.
 * [[File:SN Gatse Bernard.png]] Gatse Bernard - The third and final boss of the fourth act.