Complete the game on Hard or Delta difficulty (1)

Delta mode is super easy compared to other FPSes. If you can get through any Call of Duty game on Hardened then this will be a cakewalk. You can and it is recommended that you approach enemies from a distance with stealth so you have a surprise advantage. The key to winning is not getting swarmed in a place without cover. Use weapon attachments (via holding Select), stealth and cover and this trophy will pose no problem at all. I obtained this trophy from playing new game all the way through the campaign on Delta but it will also unlock via chapter select if you choose to play the game on an easier setting first. This trophy will pop during the credits. I made sure to wait until it popped before exiting out of the credits screen.