To unlock this achievement, you need to complete any 3 of the level trials that are available while playing on the 007 difficulty. A list of 3 level trials on the 007 difficulty can be found below;
Goldfinger - Auric Enterprises - Stealth: From the smelting room, reach Goldfinger's office without setting off an alert.
Goldfinger - Fort Knoxx - Subdue: Use Physical takedowns to subdue 10 enemies.
O.H.M.S.S. - Alpine Valley - Time: Complete the level within 3 minutes 55 seconds.
You will know when you have completed one of these trials, as it will appear in the lower left corner of the screen upon completion. You can also see which ones you have completed by going to 'Mission Select' form the main menu, and as you highlight a mission, you will see on the right hand side of the screen, a list of the trials underneath each missions details with a box next to each. If the box has a tick in it, then you have completed it.