Entering a contest where whoever gets the highest combined score in Frogger, Ms Pac Man, and Donkey Kong will win. I'm pretty familiar with all these games but never played them for score. Anything I should know that will help my score out? Or are they all pretty straight forward? Any edge I can get could be big, but I'll probably lose by a lot anyways

- Still, gotta give it my best shot.
as an old school gamer (played all of them in arcades when they where actually new games)... jeez im old. There is lots of info on the web on scorring higher in them. Good place to look is the BYOACP forums (build your own arcade control panel) they run contests weekly on games (for fun) and there are lots of tips on scoring big.
Frogger- not to much other the the fly thing, and learning to live throuhg levels.
Ms Pac Man-learn the patterns, may be the hardest one to be good at, as learning them takes hours and hours, but once you do, constant high scores are easy. I (long time ago) could play the original Pac-man till the screen split (programing bug) and you couldnt play anymore as you couldnt eat some dots. Ah... to have that kind of free time again (it took hours).
Donkey Kong- there are actually moveis about high score on this game good movie actually) KING OF KONG. this one may be the easiest to improve uyou abilities in as there is a TON of info on the web about it. But much like Frogger, they can show you waht you need to do, but reaction time and skill are all on your shoulders.
good luck