Galaga '88/Stages 27-29

These are the final three stages in the game. Much like {{~|Stages 8-10 (Dimension1, 2 or 3|stages 8 through 10]], they feature a vertically scrolling challenge in which enemies and other obstacles appear. After you travel far enough into the stage, the entire formation appears all at once.  Since these are the last stages, there are no opportunities to obtain warp capsules.  The 27th stage will culminate in a fight with a boss.  Which boss you fight is determined by the dimension you encounter them in.

Stage 27
After the two Nins disappear, the screen comes to a stop. The background will rumble as the entire stage formation appears instantly. Rely on the same strategies that got you through stages 8 through 10. If you have double or triple shots, it shouldn't be too hard to thin out the formation before they start to descend. Keep moving to avoid attacks, and don't let your Fighter get pinned into a corner where it's vulnerable to enemy fire.
 * Enemies encountered:
 * 1) Four zako will fly down together in a row.  As they do, the first of many asteroids will come into view.
 * 2) Three goei will appear from the upper right corner.  Shortly after that, four more goei will appear from the upper left corner, and fly among the asteroids.
 * 3) The red asteroids which take eight shots will now fill the left and right sides of the screen, leaving only a narrow path down the middle.  At this time, a series of brown asteroids (which only need four shots) will descend down the middle.  Between sets of brown asteroids, a lone brown pan will weave back and forth down the screen.
 * 4) After the asteroids begin to clear out near the top, two Nins will attack simultaneously.

Stage 28
After the baby Dons pass, the screen will stop scrolling and the formation will come into view. All of the same strategies for the previous stage apply. Fire up at the formation as rapidly as possible while moving back and forth to draw the enemy's fire. As with all of Dimension 2, the trickiest enemies to deal with will be the Nins, so try to eliminate them as quickly as possible.
 * Enemies encountered:
 * 1) This stage starts off with a single combine Goei descending down the screen as it winds back and forth.
 * 2) As the first asteroid appears, you will be attacked by six pairs of Nins that appear one pair at a time.  More asteroids will show up and likely get in the way of your shots as you attempt to shoot each Nin three times to destroy them.  Destroy what you can, and dodge the rest.
 * 3) After the sixth pair appears, a single crystal will fall down near the left side of the screen.  This is followed by a group of baby Dons who are arranged in the shape of a zako.  It is incredibly hard to defeat all of them, even if you have a Triple Fighter and are well prepared for them, but if you manage it, you will earn 4600 bonus points.

Stage 29
At this time, the boss of Dimension 2 will appear. An oversized version of one type of Nin creature will appear at the top of the screen. It attacks much like the mini-boss you encountered in stage 10, by shooting bullets at you, as well as spawning several enemies such as zakos, goeis, Dons, Boss Galagas, and combined goeis. It takes 20 shots to defeat the boss, and you will earn 100,000 points for doing so. You will also earn 10,000 points for every remaining life you have before flying up through the top of the screen. You will then be presented with.
 * Enemies encountered:
 * 1) This stage starts immediately with four goei flying in a line down the left side, and an Amoeba moving back and forth along the right.
 * 2) Four zako will appear on the screen together in a row along with a second Amoeba.
 * 3) The next enemies to appear will be all four Nins together in a single row.  Two extra Nin will also appear right above them.
 * 4) Lastly, two combined goei will criss-cross down the screen.