I'd refer to TwistedEuclid's guide found here: http://www.xbox360achievements.org/forum/showthread.php?t=13...
This is very easy using the massive bonuses given for not retrying. If you are about to lose, go to Xbox Dashboard (restarting or quitting from the game will still be marked as a failure). Then reload the game and adventure mode, your progress will be saved up to that level and you can try again. Completing each level with no retries nets you a 100k bonus, and (if this is anything like the PC game), you will get a 10 MILLION 'efficiency' bonus at the end of the game for no retries throughout (less if you did retry, but still millions)!
So considering the bonuses, you only need to get 82k a stage :P
Full credit goes to TwistedEuclid.