To complete this Achievement you need to have the following:
*** Spoiler - click to reveal ***All BURG.L Science Shop unlocks purchased. ("Monthly Exclusive" unlocks not required)
All Creature Cards. (Gold not required)
All Data Items collected.
All Landmarks discovered.
All Milk Molars collected.
All MIX.Rs beaten. & Super MIX.Rs
All SCA.B Flavor Schemes collected.
Max Brainpower.
You also need to defeat the following bosses:
Defeating Director Schmector.
Defeating the Hedge Broodmother.
Defeating the Mantis.
Defeating the Wasp Queen.
Defeating the Infected Broodmother.