good job on dig dug neato im haveing a hell of a time with the clear all the dirt in one lvl
Yeh i had nothing but trouble too
Dig is definitely one of the hardest XBLA achievements I've ever done. I found it easier to start off digging left-and-right, and then leave top-to-bottom for when the enemies speed up. If you can manage to do all of the left-to-right with your first life, and 1/2 of the top-to-bottom with your 2nd life, you can easily finish up on your 3rd life before the enemies speed up again.
Also, be sure to actually "dig" the entire screen, even the areas that are already black when the game starts. And try not to die immediately after digging the entire screen. Beat the 1st stage and die on the 2nd. The cheevo should pop at the score/trophy tally screen.