Dig is IMPOSSIBLE.
I don't care if you have it, I don't care if there are guides...this achievement is IMPOSSIBLE.
...maybe not...but seriously, I can't do it. My patience is gone. I've been trying for months and months to clear a screen and get this achievement, and I just cannot do it. The longer I last, the faster the enemies get, and they eventually get me.
100% Arcade/WP/Win8  | 100% Retail  | 100% Xbox One 
20k on 12/19/10 | 30k on 06/27/11 | 40k on 06/16/12
50k on 06/30/13 | 60k on 06/20/14 | 70k on 03/11/15 | 80k on 11/26/15 | 90k on 1/27/2016
Sig courtesy of DethHolly.