The next four stages of the game will take place either in the second, third or fourth dimension, and feature Cosmo-Mines (which had first appeared in Namco's own Bosconian six years previously) as obstacles; the green hexagonal space stations from that multi-directional shooter (which is the same age as the original Galaga game) are also present in the background.
Stage 15
Dimension 2
Once your triple ship has rematerialized at the bottom of the screen, four Cosmo-Mines will appear above it; once you have fired a shot at one of these Cosmo-Mines to destroy it, it will leave a blue Warp Capsule behind. Once you have collected this blue Warp Capsule, it will be displayed at the bottom of the screen as two Enormous Daruma escort two groups of six Zako into view on the left and right sides of the screen before circling around while firing a hail of bullets down at you, flying around above your ship as the twelve Zako are taking up their places in the formation above you, and flying away off the top of the screen once they have done so - and once you have fired three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two more groups of six more Zako and six Goei into view on the left and right sides of the screen before circling around while firing another hail of bullets down at you, flying around above you ship as the six Zako and the six Goei are taking their places in the formation above you, and flying away off the top of the screen once they have done so. Once you have fired three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two more groups of six more Goei and six Boss Galagans into view on the left and right sides of the screen before circling around while firing a third hail of bullets down at you, flying around above your ship as the six Goei and the six Boss Galagans are taking up their places in the formation above you, and flying away off the top of the screen once they have done so; once you have fired a total of three shots at both of these Enormous Daruma to kill them, two more groups of six Nin and six more Goei will fly into view from the left and right sides of the screen before circling around while firing a fourth hail of bullets down at you and taking their places in the formation above you - however, just before they do so, two of the Nin is in the left group and two of the Goei in the right group will break away from the formation and fly directly towards your ship. Once you have fired three shots at both of the Nin to kill them and a single shot at both of the Goei to kill them, two more groups of five more Nin will fly into view on the left and right sides of the screen before circling around while firing a fifth hail of bullets down at you and taking their places in the formation above you; however, just before they do so, one Nin in the left group and another Nin in the right group will break away from the formation and fly directly towards your ship. Once you have fired three shots at both of these Nin to kill them, the other three Cosmo-Mines will disappear if you have not destroyed them already and any remaining Galagans in the formation (there was a total of fifty-eight of them to begin with, if you count the seventeenth and eighteenth Goei, and the fifth, sixth, eleventh and sixteenth Nin, who all broke away), will begin to attack you.
If you had let at least two of the sixteen remaining Goei in the formation live, they will to meld with each other to create a giant version of themselves while the other fourteen are attacking you; once you have fired three shots at the enormous Goei to kill it (for a tenth time, its eyes will change colour from blue, to green, to yellow as you do so), it will leave another blue Warp Capsule behind. Once you have collected this second blue Warp Capsule, it will be displayed at the bottom of the screen adjacent to first one - and if you let any of th six Boss Galagans in the formation live, none of them will to fly down and engage their tractor beams while the other five are attacking you either because your triple ship is too big for them to beam up and take back up to the top of the screen. Once you have fired a shot at any remaining Galagans in the formation to kill them, the last one will leave a pink Warp Capsule behind; if your triple ship was reduced to a double or single ship at any time in the game as a result of being hit by a Galagan, or a bullet that was fired down on you by a Galagan, you should collect it, as it will instantly transform it back into a triple ship at no cost to your remaining lives. Your newly retransformed triple ship will then move back to the centre of the screen and dematerialize.
Dimension 3
Once your triple ship has rematerialized at the bottom of the screen, four Cosmo-Mines will appear above it; once you have fired a shot at one of these Cosmo-Mines to destroy it, it will leave a blue Warp Capsule behind. Once you have collected this blue Warp Capsule, it will be displayed at the bottom of the screen as two groups of five Zako and five Pink Pan fly into view on the left and right sides of the screen before circling around while firing a hail of bullets down at you and taking their places in the formation above you - however, just before they do so, one of the Zako in the left group and one of the Pink Pan in the right group will break away from the formation and fly directly towards your ship. Once you have fired a single shot the Zako to kill it and four shots at the Pink Pan to kill it, two Enormous Daruma will escort two more groups of six Goei and six more Zako into view on left and right sides of the screen before circling around while firing another hail of bullets down at you, flying around above your ship as the six Goei and the six Zako are taking up their places in the formation above you, and flying away off the top of the screen once they have done so; once you afired three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two more groups of five more Goei and five Boss Galagans into view on the left and right sides of the screen before circling around while firing a third hail of bullets down at you, flying around above your ship as the five Goei and the five Boss Galagans are taking their places in the formation above you, and flying away off the top of the screen once they have done so. Once you have fired off three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two groups of three more Goei and two more Zako, and two more Goei and three more Pink Pan into view on the left and right sides of the screen before acircling around while firing a fourth hail of bullets down at you, flying around above your ship as the five Goei, the two Zako and the three Pink Pan are taking their places in the formation above you, and flying away off the top of the screen once they have done so - and once you have fired off three shots at both of these Enormous Daruma to kill them, two more groups of five Yellow Pan and five more Zako will fly into view on the left and right sides of the screen before circling around while firing a fifth hail of bullets down at you and taking their places in the formation above you. However, just before they do so, one of the Yellow Pan in the left group and one of the Zako in the right group will break away from the formation and fly directly towards your ship; once you have fired off four shots at the Yellow Pan to kill it and a single shot at the Zako to kill it, the other three Cosmo-Mines will disappear if you have not destroyed them already and any remaining Galagans in the formation (there was a total of fifty-two of them to begin with, if you count the fifth and eighteenth Zako, the fifth Pink Pan, and the fifth Yellow Pan, who all decided to break away from the formation and fly directly towards you), will begin to attack you.
If you had let at least two of the sixteen Goei in the formation live, they will meld with each other to create a giant version of themselves while the other fourteen are attacking you; once you have fired three shots at the enormous Goei to kill it (a seventh time, its entire body will change colour from blue to green to purple as you do so), it will leave another blue Warp Capsule behind. Once you have collected this second blue Warp Capsule, it will be displayed at the bottom of the screen and adjacent to the first one - and if you let any of the five Boss Galagans in the formation live, none of them will fly down and to engage their tractor beams while the other four are attacking you either because your triple ship is too big for them to beam up and take back up to the top of the screen. Once you have fired a shot at any remaining Galagans in the formation to kill them, the last one will leave a pink Warp Capsule behind; if your triple ship was reduced to a double or single ship at any time in the game as a result of being hit by a Galagan, or a bullet that was fired down upon you by a Galagan, you should collect it, as it will instantly transform it back into a triple ship at no cost to your remaining lives. Your newly retransformed triple ship will then move back to the centre of the screen and dematerialize.
Dimension 4
Once your triple ship has rematerialized at the bottom of the screen, four Cosmo-Mines will appear above it; once you have fired a shot at one of these Cosmo-Mines to destroy it, it will leave a blue Warp Capsule behind. Once you have collected this blue Warp Capsule, it will be displayed at the bottom of the screen as two Enormous Daruma escort two groups of five Zako and five Kan into view on the left and right sides of the screen before circling around while firing a hail of bullets down at you, flying around above your ship as the five Zako and the five Kan are taking their places in the formation above you, and flying away off top of the screen once they have done so - and once you have fired three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two more groups of five more Zako into view on left and right sides of the screen before circling around while firing another hail of bullets down at you, flying around above your ship as the ten Zako are taking their places in the formation above you, and flying away off the top of the screen once they have done so. Once you have fired three shots at both of these Enormous Daruma to kill them, two more Enormous Daruma will escort two more groups of five Goei, and three more Kan and two more Zako, into view on the left and right sides of the screen before circling around while firing a third hail of bullets down at you, flying around above your ship as the five Goei, the three Kan and the two Zako are taking their places in the formation above you, and flying away off the top of the screen once they have done so; once you have fired three shots at both of these Enormous Daruma to kill them, two more groups of six more Goei and six Boss Galagans will fly into view from the left and right sides of the screen before acircling around while firing a fourth hail of bullets down at you and taking their places in the formation above you - however, just before they do so, two of the Goei in the left group and two of the Boss Galagans in the right group will break away from the formation and fly directly towards your ship. Once you have fired single shot at both of the Goei to kill them and two shots at both the Boss Galagans to kill them, two more groups of five more Goei and five more Zako will fly into view on the left and right sides of the screen before circling around while firing a fifth hail of bullets down at you and taking their places in the formation above you; however, just before they do so, one of the Goei it is in the left group and one of the Zako in the right group will break away from the formation and fly directly towards your ship. Once you have fired a single shot at the Goei and the Zako to kill them, the other three Cosmo-Mines will disappear if you have not destroyed them already and any remaining Galagans in the formation (as with this stage from the third dimension, there was a total of fifty-two of them to begin with, if you count the tenth, eleventh and sixteenth Goei, the fifth and sixth Boss Galagans, and the twenty-second Zako, who had all decided to break away from the formation and fly directly towards you) will begin to attack.
If you had let at least two of the thirteen remaining Goei in the formation live, they will meld with each other to create a giant version of themselves while the other eleven are attacking you; once you have fired three shots at the enormous Goei to kill it (in this dimension, its eyes will change colour from yellow to green to purple as you do so), it will leave a second blue Warp Capsule behind. Once you have collected this second blue Warp Capsule, it will be displayed at the bottom of the screen adjacent to the first one - and if you let any of the four remaining Boss Galagans in the formation live, none of them will fly down and engage their tractor beams, while the other three are attacking you either, because your triple ship is too big for them to beam up and take back up to top of the screen. Once you have fired a shot at any remaining Galagans in the formation to kill them, the last one will leave pink Warp Capsule behind; if your triple ship was reduced to a double or single ship at any time in the game as result of being hit by a Galagan, or a bullet that was fired down on you by a Galagan, you should collect it, as it will instantly transform it back into triple ship at no cost to your remaining lives. Your newly retransformed triple ship will then move back to centre of the screen and dematerialize.