Pretty self explanatory, get the badge Top Secret as fast as possible, involving:

1. unlocking all secret gamemodes (unlock%)
2. scoring 300,000 or more on all of those gamemodes

Careful there. I tried All Badges 100% last night, and the badge requires the TOP score on all 4 secret modes.

...I had 2 game modes I probably wasn't able to beat in a single run, much less 4.5 million on Diamond Mine.

Reset your scores before attempting this badge.

IMO the requirement should be to get 300k in every secret mode in place of Top Secret. (Applies to 100% and this concept)