Namco Museum: 50th Anniversary Arcade Collection (PC)
Score 15,000 points in one session of Pac-Man and 20,000 points in one session of Ms. Pac-Man.
Score 40,000 points in one session of Galaga.
Mappy: Open doors without touching them
As long as the doors are on the screen and Mappy is facing them, you can still open and close them.
Strategy guides from GameFAQs