Welcome to the game. Once the act's theme starts to be heard from the Yamaha YM-2151, Dr. Ryan and Dr. Ellis will walk into view from the left side of the screen with three airport guards; five Mobile Armours will then fly into view from the left side of the screen, and fire a shot at each of the three airport guards to kill them, before firing a shot at the window behind them to make it shatter and cause a massive explosion. Dr. Ryan will then shout "Help!" as the screen starts scrolling to the right - and four 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 each of them to kill them, a fifth Zaku will jump out from behind a pillar in the background and throw a grenade at you; once you have fired a shot at him to kill him, a sixth Zaku will come running into view from the left side of the screen, while firing shots at you. Once you've fired a shot at him to kill him a seventh Zaku will come up directly in front of you and start firing shots at you - and once you've fired a shot at him to kill him, four more Zaku will come running into view from the left side of the screen, while firing shots at you. Once you've fired a shot at each of these to kill them, a twelfth Zaku will jump out from behind a second pillar in the background and throw another grenade at you; once you've fired a shot 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've fired a shot at both of them to kill them, four more Zaku will jump back into view from directly in front of you, and start firing shots at you - and once you've fired a shot at each of these to kill them, a nineteenth 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 him to kill him, a twentieth Zaku will jump out from behind a third pillar in the background, and throw a third grenade at you; once you have fired a shot at him to kill him, four 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 each of them to kill them four red fast-forward signs will appear on the right side of the screen as four more pillars (standing in front of each other) obscure your view for a split-second - and a twenty-fifth Zaku will then 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, a twenty-sixth Zaku will jump out from behind the bottom of the staircase in the background, and start firing shots at you; once you've fired a shot at him to kill him six more Zaku 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 each of them to kill them, a Domu will come up at the top of the staircase in the background and start firing missiles at you; once you have fired enough shots at him to kill him, four Innocent Bystanders will come running into view from the right side of the screen with the text of "DON'T SHOOT!" above them. A sixth Mobile Armour will then come flying into view on that right side of the screen, while firing missiles at you - and once you have fired enough shots at him to kill him, five more Zaku will come running 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, a thirty-eighth Zaku will come up directly in front of you, and start firing shots at you; once you have fired a shot at him to kill him, a second Domu will come up at the top of the staircase in the background, and start firing missiles at you. Once you've fired enough shots at him to kill him, a thirty-ninth Zaku will jump out from behind the bottom of the staircase in the background and start firing shots at you - and once you have fired a shot at him, to kill him, two more Zaku will come running into view from that left side of the screen, while firing shots at you. Once you have fired a shot at both of them to kill them, a third Domu will come running into view from the right side of the screen and start firing missiles at you; once you have fired enough shots at him to kill him, a forty-second Zaku will come up directly in front of you and start firing shots at you. Once you have fired a shot at him to kill him, a Gufu will jump out from behind a support wall in the background, and throw a fourth grenade at you - and once you have fired enough shots at his shield to destroy it, then fired enough shots at him to kill him, two more Zaku will jump back into view from directly in front of you and start firing shots at you. Once you have fired a shot at both of them to kill them, three more Zaku will run into view from the left side of the screen while firing shots at you; once you have fired a shot at each of them to kill them, 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, a second Gufu will jump out from behind another support wall in the background and throw a fifth grenade at you - and once you have fired enough shots at his shield to destroy it, then fired enough shots at him to kill him, two more Domu will come up at the top of the staircase in the background, and start firing missiles at you. Once you have fired enough shots at both of these to kill them, two more Innocent Bystanders will come running into view from the right side of the screen as the text "DON'T SHOOT!" appears above them; a seventh Mobile Armour will now come flying 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, a third Gufu will jump out from behind a third support wall in the background, and throw a sixth grenade at you - and once you've fired enough shots at his shield to destroy it, then fired enough shots him to kill him, a fourth Gufu will emerge from behind the first "SDL" desk in the background, and throw a seventh grenade at you. Once you've fired enough shots at his shield to destroy it, then fired enough shots at him to kill him, two more Domu will come up at the top of the staircase in the background, and start firing missiles at you; once you fire enough shots at both of these, to kill them, two more Domu will come running into view from the right side of the screen, and start firing missiles at you. Once you've fired enough shots at both of these, to kill them, two more Innocent Bystanders will come running into view from the left side of the screen as the text of "DON'T SHOOT!" appears above them - and two more Domu will then 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, four more Zaku will come running 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, a fifth Gufu will jump out from behind a fourth support wall in the background and throw an eighth grenade at you. Once you've fired enough shots at his shield to destroy it, then fired enough shots at him to kill him, two more Zaku will come running into view on the right side of the screen while firing shots at you - and once you've fired a shot at both of them to kill them, a fifty-fourth Zaku will jump back into view from directly in front of you and start firing shots at you. Once you've fired a shot at him to kill him, a fourteenth Domu will come up from behind the top of the staircase in the background, then start 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 and left sides of the screen and start firing missiles at you. Once you've fired enough shots at both of these ones to kill them, three more Zaku will come running into view from the left and right sides of the screen and start firing shots at you - and once you have fired a shot at each of them to kill them two more Domu will come up at the top of the staircase in the background and start firing missiles at you. Once you have fired enough shots at both of them to kill them, a fifty-eighth Zaku will come up directly in front of you, then start firing shots at you; once you have fired a shot at him to kill him, a fifty-ninth Zaku will jump out from behind the second "ALCESS NIA LINE" desk in the background then start firing shots at you. Once you have fired a shot at him to kill him, a nineteenth Domu will come up from behind the top of the staircase in the background and start firing missiles at you - and once you've fired enough shots at him to kill him a sixtieth Zaku will come up directly in front of you and start firing shots at you. Once you've fired a shot at him to kill him, a sixth Gufu will jump down to the ground from the top of the staircase in the background and throw a ninth grenade at you; once you have fired enough shots at his shield to destroy it, and fired enough shots at him to kill him, a sixty-first Zaku will come running into view on the left side of the screen while firing shots at you. Once you've fired a shot at him to kill him, a twentieth Domu will come running into view from that right side of the screen, while firing missiles at you - and once you've fired enough shots at him to kill him, two more Innocent Bystanders will run into view from that right side of the screen as the text "DON'T SHOOT!" appears above them. Two more Zaku will then come running 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, an eighth Mobile Armour will come flying 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, five more Zaku will come running into view, from the left and right sides of the screen, while firing shots at you - and once you've fired a shot at each of these, to kill them, a sixty-ninth Zaku will come up directly in front of you and start firing shots at you. Once you've fired a shot at him to kill him, a twenty-first Domu will come running into view from the right side of the screen, and start firing missiles at you; once you've fired off enough shots at him, to kill him, a seventieth Zaku will come running into view on the left side of the screen, while firing shots at you. Once you have fired a shot at him to kill him, a Biker Zaku will fly out from behind a fifth support wall in the background and start firing shots at you - and 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've fired a shot at both of them to kill them a seventh Gufu will jump out from behind a sixth support wall in the background and throw a tenth grenade at you; once you've fired enough shots at his shield to destroy it, then fired enough shots at him to kill him, three more Zaku will come running 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, a twenty-second Domu will come running into view from the left side of the screen and start firing missiles at you - and once you have fired off enough shots at him to kill him, a second Biker Zaku will fly out from behind a seventh support wall in the background and start firing shots at you. Once you've fired enough shots at this one, to kill him, the screen will stop scrolling to the right, as three more Mobile Armours burst through the wall and start firing missiles at you; once you've fired enough shots at each of these to kill them, three more red fast-forward and three red rewind signs will appear on the left and right sides of the screen as it starts scrolling inward through the hole in the wall that the ninth, tenth and eleventh Mobile Armours had made.
A twelfth Mobile Armour will then fly into view on the right side of the screen while firing missiles at you; once you've fired enough shots at him to kill him, three more Biker Zaku will fly into view on the left side of the screen, then throw three more grenades at you. Once you have fired enough shots at each of them to kill them, three more red rewind signs will appear on the left side of the screen as it starts scrolling to the left - and a thirteenth Mobile Armour will then 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 Biker Zaku will fly into view from the right side of the screen while firing shots at you; once you've fired enough shots at both of them to kill them a fourteenth 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, five more Biker Zaku will fly into view from the right side of the screen, while firing shots at you - and once you have fired enough shots at each of them to kill them, four more Zaku will come running 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 you'll come to three more Zaku on the left side of the screen that are firing shots at you; once you have fired a shot at each of them to kill them, the screen will start scrolling inward for a second time, as a fourteenth Mobile Armour flies into view on its left side while firing missiles at you. Once you have fired enough shots at him to kill him, a Mosquito will fly into view on the left side of the screen, while firing shots at you - and once you have fired a shot at him to kill him, the screen will jump over a stack of shipping crates. A thirteenth Biker Zaku will then fly into view upon the right side of the screen and throw a fourteenth grenade at you; once you fire enough shots at him, to kill him, two more Mosquitoes will fly into view on the left and right sides of the screen, while firing shots at you. Once you have fired a shot at both of them to kill them, three more Biker Zaku will come flying into view on the right and left sides of the screen, while firing shots at you - and once you've fired enough shots at each of them to kill them, three more red fast-forward signs will appear on the right side of the screen, as it starts scrolling to the right again. Two more Mobile Armours will then fly into view from the left side of the screen, while firing missiles at you; once you've fired enough shots at both of these to kill them, three more 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 each of them to kill them, the screen will start scrolling inward for the third time as two more Mobile Armours fly into view on its right and left sides, while firing missiles at you - and once you fire off enough shots at both of them to kill them, the screen will stop scrolling inward as Green Falcon comes flying towards you while firing missiles at you. Once you've fired enough shots at it to defeat it, it will explode and fall to the ground; the screen will then scroll outward a bit, as Hart emerges from the wreckage and starts shooting flames at you. Once you have fired enough shots at him to kill him, the "stage clear" theme will be heard from the Yamaha YM-2151 as the text "ACT 1 IS OVER" appears on the screen - and four police cars will now drive into view from the left and right sides of the screen as eight police officers emerge from them.
Both players' scores (which were not displayed during gameplay) will then be displayed on either side of the text "SCORE", their hit/miss ratios on either side of the text "HIT RATE", and their misses on either side of the text "MISS SHOT" at the top of the screen, above a shot of the "Neo Arc Police Chief" shouting at Garcia and Cliff; the text of "TODAY'S GRIEVANCES: XXX" will then appear below it (XXX being the combined total of both players' misses).