Once the act's theme starts to be heard from the Yamaha YM-2151, the screen will start scrolling inward (past nine more Neo Arc police cars on the left and right sides of the screen) as four normal cars drive into view and two Innocent Bystanders come running into view from the left side of the screen as the text "DON'T SHOOT!" appears above them; the screen will then start scrolling to the left as two more normal cars drive on into view from its left side, then start scrolling inward again as Enormous Weapon Ryushiferu (who is "in the background") fires a shot at five more normal cars on the left and right sides of the screen to destroy them. Two Mobile Armours (who now have a different colour scheme) will then fly into view upon the left and right sides of the screen while firing missiles at you - and once you have fired off enough shots at both of them to kill them five Spiders (who now also have a different colour scheme) will come running directly towards you while firing shots at you. Once you have fired a shot at each of them to kill them, two more Mobile Armours will fly into view on the right and left sides of the screen while firing missiles at you; once you've fired enough shots at both of these to kill them, two Biker Zaku (who again now also have a different colour scheme) will fly into view on the left side of the screen, while throwing grenades at you - and once you've fired enough shots at both of them to kill them, two more Mobile Armours will fly into view on the right and left sides of the screen while firing missiles at you. Once you have fired enough shots at both of them to kill them, Enormous Weapon Ryushiferu will fire two more shots at a twelfth normal car and a building in the background to destroy them; four red fast-forward signs will then appear on the right screen side as it starts scrolling to the right as Enormous Weapon Ryushiferu fires an eighth shot at another building in the background to destroy it. Two more Mobile Armours will then fly out from behind a third building in the background on the left side of the screen while firing missiles at you - and once you've fired enough shots at both of them to kill them, four more Mobile Armours will come up into view from behind three more buildings in the background, and start firing missiles at you. Once you have fired enough shots at each of them to kill them, two more Innocent Bystanders will run into view from the right side of the screen as the text "DON'T SHOOT!" appears above them; a Domu (who, once again, now also has the different colour scheme) will then come running into view from the right side of the screen while firing missiles at you. Once you have fired enough shots at him to kill him, ten Zaku (who, yet again, now also have a different colour scheme) will come running into view from the left and right sides of the screen, while firing shots at you - and once you have fired a shot at each of them to kill them, a third Biker Zaku will fly into view from the left side of the screen while firing shots at you. Once you've fired enough shots at him to kill him, a thirteenth Mobile Armour will fly into view from the right side of the screen while firing missiles at you; once you've fired enough shots at him to kill him, two more Domu will come running into view from the right side of the screen while firing missiles at you. Once you've fired enough shots at both of them to kill them, two more Domu will come up directly in front of you, then start firing missiles at you - and once you've fired enough shots at both of these to kill them, eight more Zaku will run into view from the right and left sides of the screen, while firing shots at you. Once you've fired a shot at each of them to kill them, a sixth Domu will come running into view from that right side of the screen, while firing missiles at you; once you have fired enough shots at him to kill him, a fourth Biker Zaku will fly into view from the left side of the screen, while firing shots at you. Once you have fired enough shots at him to kill him a seventh Domu will come running into view from the right side of the screen while firing missiles at you - and once you have fired enough shots at him to kill him, a fourteenth Mobile Armour will fly into view from that right side of the screen, while firing missiles at you. Once you have fired enough shots at him to kill him two more Zaku will come running into view from the left side of the screen while firing shots at you; once you have fired a shot at both of them to kill them, a fifteenth Mobile Armour will come down into view from the top of the screen while firing missiles at you. Once you have fired enough shots at him to kill him the screen will start scrolling inward once again as four more Mobile Armours come flying directly towards you on its left and right sides while firing missiles at you - and once you have fired enough shots at each of them to kill them, a fifth Biker Zaku will fly into view on the right side of the screen, while throwing grenades at you. Once you've fired enough shots at him, to kill him, five more normal cars will drive into view on the right and left sides of the screen, as Enormous Weapon Ryushiferu fires five more shots at each of them to destroy them; the screen will then jump over those resulting explosions, as a twentieth Mobile Armour flies into view from the right side of the screen and starts firing missiles at you. Once you have fired enough shots at him to kill him, a sixth Spider will come running into view on the left side of the screen, while firing shots at you; once you've fired off a shot at him to kill him a twenty-first Mobile Armour will fly into view from the left side of the screen while firing missiles at you. Once you have fired enough shots at him to kill him, four more Biker Zaku will fly into view on the left and right sides of the screen to throw grenades at you - and once you have fired enough shots at each of these to kill them, a twenty-second Mobile Armour will fly into view from the right side of the screen, while firing missiles at you. Once you have fired enough shots at him to kill him, the screen will stop scrolling inward as Green Zugoku (the act's first boss) hovers into view from its left side (while firing missiles at you) - and once you've fired enough shots at him to defeat him, he will explode and fall to the ground.
The screen will then continue scrolling inward as a large green aeroplane (which is not quite as large as Green Falcon was) flies into view from directly behind you, and drops twelve more Zaku and six more Spiders onto the ground as it flies off into the distance; once you've fired a shot at each of them to kill them, two more Mobile Armours will fly into view from the right and left sides of the screen, while firing missiles at you. Once you've fired enough shots at both of them to kill them, three more Biker Zaku will fly into view on the left and right sides of the screen, while throwing grenades at you - and once you have fired enough shots at each of them to kill them, three more Mobile Armours will fly into view from the right side of the screen while firing missiles at you. Once you've fired off enough shots at each of these, to kill them, four rewind signs will appear on that left side of the screen as it starts scrolling to the left; Enormous Weapon Ryushiferu will fire two more shots at two more buildings in the background to destroy them and the screen will start scrolling inward yet again as three more Mobile Armours fly into view from its right side while firing missiles at you. Once you fire enough shots at each of them to kill them, six more Spiders will come running into view on the right and left sides of the screen, while firing shots at you - and once you have fired a shot at each of them to kill them, two more Mobile Armours will fly into view on the left and right sides of the screen while firing missiles at you. Once you've fired enough shots at both of these to kill them, two more Biker Zaku will fly into view from the left and right sides of the screen while firing shots at you; once you have fired enough shots at both of them, to kill them, six more Zaku and two more Domu will come running into view from the right and left sides of the screen while firing shots and missiles at you. Once you have fired enough shots at each of these to kill them, a thirty-first Mobile Armour will fly into view on the right side of the screen, while firing missiles at you - and once you've fired enough shots at him to kill him, three more Zaku and a tenth Domu will run into view, on the right and left sides of the screen, while firing shots and missiles at you. Once you have fired off enough shots at all of them to kill them, a thirty-second Mobile Armour will come down into view from the top of the screen, while firing missiles at you; once you have fired enough shots at him to kill him, two more Spiders will come running into view from the right and left sides of the screen while firing shots at you. Once you've fired a shot at both of them to kill them, a Mosquito will fly into view from the left side of the screen while firing shots at you - and once you have fired a shot at him to kill him two more Mobile Armours will come flying directly towards you on the left and right sides of the screen while firing missiles at you. Once you have fired enough shots at both of them to kill them the screen will start scrolling to the right again as a thirty-fifth Mobile Armour flies into view from its right side while firing missiles at you; once you've fired enough shots at him to kill him, two more Domu will come running into view from the right side of the screen while firing missiles at you. Once you have fired enough shots at both of them to kill them, four more Innocent Bystanders will run into view from the right side of the screen as the text of "DON'T SHOOT!" appears above them - and two more Domu and seven more Zaku will then come running into view from the right and left sides of the screen while firing missiles and shots at you. Once you have fired enough shots at all of them to kill them Enormous Weapon Ryushiferu will fire two more shots at two more buildings in the background to destroy them; the screen will now start scrolling inward for a fifth time as three more Mobile Armours come flying into view from its left side while firing missiles at you. Once you have fired enough shots at each of them to kill them the screen will start scrolling to the right once again as two more Biker Zaku fly into view from the left and right sides of the screen while firing shots at you - and once you have fired enough shots at both of them to kill them three more Domu will come up on top of an eleventh building in the background, and start firing missiles at you. Once you have fired enough shots at each of these to kill them, a thirty-ninth Mobile Armour will come down into view from the top of the screen, while firing missiles at you; once you have fired enough shots at him to kill him a forty-ninth Zaku will come running into view from the right side of the screen while firing shots at you. Once you have fired a shot at him to kill him, two more Domu will come up on top of a twelfth building in the background, then start firing missiles at you - and once you have fired enough shots at both of them to kill them, eleven more Zaku and two more Domu will run into view from the left side of the screen while firing shots and missiles at you. Once you have fired a shot at each of these to kill them, four more Domu will come up on top of two more buildings in the background, then start firing missiles at you; once you've fired off enough shots at all of these, to kill them, three more Mobile Armours will come down into view from the top of the screen, while firing missiles at you. Once you've fired enough shots at each of these to kill them, the screen will start scrolling inward for a sixth time as two more Mobile Armours come down into view from the top of the screen, then start firing missiles at you - and once you have fired enough shots at each of them to kill them, three more Spiders will run into view from the right and left sides of the screen, while firing shots at you. Once you have fired a shot at each of them to kill them, two more Mobile Armours will fly into view on the left and right sides of the screen while firing missiles at you; once you have fired enough shots at both of them to kill them, two more Spiders will run into view on the right and left sides of the screen, while firing shots at you. Once you have fired a shot at both of them to kill them, two more Biker Zaku will fly into view from the left and right sides of the screen, while firing shots at you - and once you have fired enough shots at both of them to kill them, six more Zaku and two more Domu will come running into view from the right and left sides of the screen, while firing shots and missiles at you. Once you have fired enough shots at each of them to kill them, a forty-seventh Mobile Armour will fly into view from the right side of the screen while firing missiles at you; once you have fired enough shots at him to kill him two more Mobile Armours will come down into view from the top of the screen, while firing missiles at you. Once you have fired enough shots at both of these to kill them, three more Zaku will come running into view from the left and right sides of the screen, while firing shots at you - and once you have fired a shot at each of them to kill them, the screen will start scrolling to the right (yet again) as a fiftieth Mobile Armour comes flying into view from the left side of the screen while firing missiles at you. Once you have fired enough shots at him, to kill him, Enormous Weapon Ryushiferu's left leg will come down from the top of the screen (to crush two more normal cars beneath it); three upward-facing rewind/fast-forward signs will then appear at the top of the screen as it starts scrolling upward, and two more Mobile Armours come down into view from the top of it while firing missiles at you. Once you have fired enough shots at both of them to kill them, the screen will stop scrolling upward, and the unique theme of Enormous Weapon Ryushiferu (the act's second boss) will start to be heard from the Yamaha YM-2151 as you come face-to-face with him at the top of a fifteenth building - and he attacks by firing missiles at you from his two primary head-mounted cannons. Once you have fired enough shots at both of these to destroy them, he will rise up to the top of the screen, and start firing shots at you from his eight secondary chin-, chest-, and leg-mounted cannons; once you have fired enough shots at each of these, or just the one mounted in the centre of his chest to destroy them, he will explode and sink down off the bottom of the screen (his unique theme will also fade out).
The screen will then jump into the air and start scrolling downward, as it comes to Dr. Ryan (who is holding the unconscious Dr. Ellis under his right arm, and waving his left); the unique theme of Gatse Bernar (the act's third and final boss) will then start to be heard from the Yamaha YM-2151 as he comes up from the bottom of the screen, and starts firing shots at you. As you are firing shots at him (they won't register while he is holding his right arm in front of his face to block them), his "flesh" covering will wear away, and expose his metallic body - and once you have fired enough shots at him to defeat him, he will explode and sink down off the bottom of the screen. The text "ACT 4 IS OVER" will then appear on the screen and you can now enjoy the ending:
The text "CONGRATULATIONS!" will then be displayed in the centre of the screen, as both players' scores (which were not displayed during gameplay) are displayed on either side of the text "SCORE", their hit/miss ratios on either side of the text "HIT RATE" and their end-of-game bonuses (which will be their hit/miss ratios multiplied by 200), on either side of the text "BONUS" below it, as their end-of-game bonuses are added to their scores; both players' scores will then again be displayed on either side of that text "SCORE" and their hit/miss ratios on either side of that text "HIT RATIO", with their number of misses on either side of the text "MISS SHOT" and their number of coins on either side of the word "CREDIT" at the top of the screen above a shot of Dr. Ryan and Dr. Ellis running up to Garcia and Cliff and the text "DR. RYAN AND DR. ELLIS HAVE BEEN SAFELY RESCUED." will appear below it. If the first player (Garcia) finished with the higher score after his end-of-game bonus, the shot will look like this (note that he's smiling and Cliff's frowning):
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But if second player (Cliff) finished with the higher score after his end-of-game bonus, it will look like this (note that he is smiling and Garcia is frowning):
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After the credits are finished, the game will go into high-score mode, as the high-score theme starts to be heard from the Yamaha YM-2151; your scores will most likely be the two highest values upon the cabinet to date so you should use the lightguns to enter your initials at the top of the table ("TODAY'S BEST 5") with pride, regardless of which way around they are positioned. Once you have done so, the game will go back into attract mode - and if either of the players' number of misses is higher than 120, their initials will also be displayed on another table of missed-shot rankings ("TODAY'S WORST 5").