14. Executed - Metal Gear Solid V: The Phantom Pain
Completed MGS V? Clocked the replay missions with the extra modifiers and ran through all 157 Side-Ops? Good, give yourself a pat on the back - but you're not done. Instead, the fairly obscure Executed achievement asks that you spend the time finding every last one of the optional objectives in the main story and completing them. You might have noticed on the side of the screen as you're taking out random soldiers or obtaining blueprints, it'll pop up "Mission Objective 3/7", denoting that you've stumbled upon and executed an optional task - it's these you're looking for. Every mission has a good handful of these to complete, but to find narrow them down you'll have to spend time interrogating soldiers to locate things like specialist troops, rough diamonds or equipment. Luckily all the main missions can be replayed with whatever fancy tech you've crafted across on your save, and whichever of these objectives you missed will show up on a second visit, so now's the time to take that new Rocket Punch out for a spin.