Brain Field Expert Achievement
Brain Field Expert35
Raised the EXP bonus to the maximum.The maximum EXP bonus possible in the game is 1.8x which can only be obtained inside the Brain Field. You can get up to 1.5x in the regular Brain Drive state, which you'll want to do first before activating Brain Field to make that last 0.3x a little easier to obtain. Killing enemies with Brain Crush gives the highest boost to the multiplier, so aim to do that on a number of enemies consecutively to quickly hit the max. The video below shows this off nicely.