Pac-Man 25th Anniversary Edition

Wait until one of the top ships(the green ones that take two shots to kill) comes down and fires off a tractor beam(the beam that can capture your ship). Let it capture your ship. Now, wait until it swoops down again with your ship behind it. Simply kill the head ship(the green one), and it will lose your ship. Your ship will then lock on to the side of your current ship, giving you two ships to play with at the same time! Now, be careful. Not only will both ships be firing at you after your ship gets captured, but if you accidently shoot your captured ship, you'll destroy it. Also note, this will cost you one life, but will definately make the Challenging Stages, and perhaps the game itself, a little easier to play. Note: This works in all non-bootleg/hack versions of Galaga, as well as most of the sequels and Arranged Mode in Namco Classic Collection Vol. 1.

On most revisions of Galaga, there's a trick that stops enemies from firing at your ship. In Stage one, kill all aliens except the two bees in the bottom-left corner. Allow the bees to dive down and shoot at you, while dodging their shots. After around fifteen minutes or so, the bees will continue to drop down, but they won't fire. Let them drop down another five or six times, then kill them. After all this, enemies will not shoot at you for the rest of the game.

You can speed up Pac-Man and Ms. Pacman or enable fast shooting in Galaga by entering this code after inserting coins. Once you enter the code, you should hear a sound indicating that the code worked. Now just select a game and enjoy! Credit goes to GinsuVictim for posting this on the cheat page for Namco 20 Year Reunion: Ms. Pac-Man/Galaga - Class of 1981.