This is a very easy one. unlocked in the single player campaign, in the chip upgrade menu. you begin the game with one chip upgrade, and gain two more for the first chip extraction you do in the game. Once you have enough chips for 2 upgrades, upgrade you chip starting with the top one, then the middle one in the second row to the top(linked). You will know if they are linked because it will light up blue when you preview the upgrade. it may take 3 in a row, but i believe its only 2. cake walk.