ARCADE GAME SERIES: GALAGA

You can also get the Single Perfect achievement with this one because the are very easy to earn together.
Waves:
Wave 1: Go to the very right side of the screen and mash or once the enemies get directly infant of you.
Wave 2: Get halfway across the crown emblem and start shooting once the enemies first get directly above you.
(It's easier to pass and time this wave by mashing instead of holding down ) Thanks to J45ON92 for this
Wave 3: Go above the 3rd ship emblem (2nd to last) and start shooting once the enemies are directly above you.
Wave 4: Go to the very left side of the screen and start shooting once the enemies are directly above you, same as Wave 1 just other side.
Wave 5: Is the exact same wave as Wave 1 and 4 so just go to the very right of the screen and start shooting once the enemies are directly in front of you.

Heres a clip that VodkaFlockaFlme made showing how to get a perfect:

Tips to make the game easier:
Before the game starts you can go into Settings then Game Settings and change your maximum amount of lives from 3 to 5. You can also turn on select level. This will allow you to choose any level that you have reached. I would also recommend holding down the button instead of pressing the button because it shoots faster.

If you're down voting please let me know why! Thanks!