Prototype

Military alerts will be triggered when any military personnel who can see you observe you using your offensive powers, attacking other military personnel, using a defensive power, consuming anyone, picking up cars or people, or changing your disguise. You might also trigger an alert if you run down the street using the R2 button and hop over a tank. Viral Detectors can also cause an alert if you stay in their radius long enough, so pay attention to the alert meter if one is nearby.
Many missions will have scripted alerts in them, making it impossible to get any credit towards this trophy. However, the missions below are very easy to complete without raising an alert. Be sure to save before attempting them so you can quit to the main menu and reload your save should you raise an alert in these missions.

See this post for the mission walkthroughs: Mankind Is Your Mask - View Single Post

You can track your progress under the Statistics -> General page on the pause menu. This statistic carries over to a New Game + save, so if you screw up or have trouble with one mission, start a New Game + and repeat one of the other missions again to unlock the trophy.

Military alerts will be triggered when any military personnel who can see you observe you using your offensive powers, attacking other military personnel, using a defensive power, consuming anyone, picking up cars or people, or changing your disguise. You might also trigger an alert if you run down the street using the R2 button and hop over a tank. Viral Detectors can also cause an alert if you stay in their radius long enough, so pay attention to the alert meter if one is nearby.
Many missions will have scripted alerts in them, making it impossible to get any credit towards this trophy. However, the missions below are very easy to complete without raising an alert. Be sure to save before attempting them so you can quit to the main menu and reload your save should you raise an alert in these missions.

See this post for the mission walkthroughs: Mankind Is Your Mask - View Single Post

You can track your progress under the Statistics -> General page on the pause menu. This statistic carries over to a New Game + save, so if you screw up or have trouble with one mission, start a New Game + and repeat one of the other missions again to unlock the trophy.