Gaplus/Walkthrough

Get up to 6x firepower
A concept in this game that improves on one of the most interesting features of Galaga is the red "blaster head" occasionally yielded by the Kings. By killing the King on the current stage when he is attacking with it, it will fall down onto the top of your ship; you can then get up to 6x firepower by capturing as many Zako, Goei, Cap and Ado as you can in the resulting tractor beam and force them to fight their alien comrades alongside you. The entire sequence, much like the opening of any non-bonus stage from the original Galaga game, goes like this:
 * You survive the entrance section. (Note: If you are killed before all the aliens have taken their place in the formation, the stage will start over from the beginning - unlike the original.)
 * When the King appears, he will have the red blaster head in tow. Wait until he starts attacking before you shoot him - because if you do not, he will take the red blaster head with him.
 * After you have killed the King, the gameplay will freeze for a few seconds as the blaster head falls down and lands on the top of your ship (which has returned to bottom of the screen).
 * A multicoloured energy beam starts emanating from the top of the blaster head. Try to capture as many aliens as you can with it before it deactivates and the blaster head disappears.
 * If any aliens are caught in the beam, they will line up on either side of your ship after the beam has deactivated and proceed to move and fire at the same time as you do. They are still vulnerable to their comrades' shots, however. (Note: Although any aliens working alongside your ship will normally die individually when hit, if your own ship takes a hit they will all die.)

Challenging Stages
A Challenging Stage occurs on the third stage and every fourth stage thereafter. They are very different from those of the original Galaga. When the enemies appear, you must "juggle" them with your shots in order to slowly spell a secret word out for extra bonus points. The secret words and the maximum point values you can get for spelling them out are as follows:
 * Stage 3: BONUS, 37800 points
 * Stage 7: GAPLUS, 65200 points
 * Stage 11: DOUBLE, 50600 points
 * Stage 15: TRIPLE, 78300 points
 * Stage 19: GOOD!! 95500 points
 * Stage 23: BYEBYE, 25000 points
 * Stage 27: EXTEND, 25000 points

How to get the "Hypership" (the bottom ship on the title screen)
At the start of the first stage, the player must move the ship up the screen until it stops and just let it sit there without shooting anything until all forty-three of the aliens have taken their place in the formation. After the shooting star appears, the player must shoot the second Zako from the left in the bottom row of the formation without hitting any other enemies. A Rally-X Special Flag will then appear, and when the King flies down, the player must crash into him (but not the "blaster head" that he is yielding) and your regular ship will turn into a "Hypership" that can fire three shots on the screen at a time instead of just two. However, if you fail to do this correctly, you will not have any other chances to do this in the game.

Enter your name, age and blood group
On the original Japanese version of this game, you will be asked to enter your name (up to six characters), age and blood group on the high score table once you have lost your last life. If you don't know what your blood group is, you can either enter two question marks instead of a two-letter combination or just leave the space blank. The later US version of the game only lets players enter up to three characters in their names (which is half of the original value), and does away with the ages and blood groups (probably because this was too unnecessary).