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.

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.