Press Left, Right, Left, Right, Up, Down, Up, Down at the Galaga Arrangement title screen.
Pac-Man: Pac-Attack game
Select Pac-Man at the games screen. Get over 25,000 points during game play to unlock Pac-Attack at the games screen.
Ms. Pac-Man: Pac-Mania game
Select Ms. Pac-Man at the games screen. Get over 20,000 points during game play to unlock Pac-Mania at the games screen.
Galaga
Do not shoot any bees as the come down. After all bugs are lined up and ready to go You will see two bees to the far left of the screen one on top of each other. Do not shoot those two bees. Kill everything but those two. After those two bees are left let them fly around and avoid them. I repeat do not shoot those two bees. After about five to ten minutes those two bees will quit firing. When they quit firing shoot them. The rest of the game none of the bugs will fire at all. This code works for level 1,2 4. After that if you haven't gotten them to quit firing start over.