Easy "Unlocked" Achievement for Metal Gear Solid V: Ground Zeroes - Xbox One

• Easy "Unlocked" Achievement

After completing a mission you can see the available trials in the menu. However some must be unlocked first. Under the normal difficulty setting you have to mark all enemies in each mission (trial "mark all enemies", except intel operative rescue) to unlock all missing trials. Under the hard difficulty setting you must complete each mission once again (trial "fastest completion", except intel operative rescue) to unlock all missing trials.

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