Deus Ex features combat similar to first-person shooters, with real-time action, a first-person perspective, and reflex-based gameplay.[1] As the player will often encounter enemies in groups, combat often tends toward a tactical approach, including the use of cover, strafing, and "hit-and-run." A USA Today reviewer found, "At the easiest difficulty setting, your character is puréed again and again by an onslaught of human and robotic terrorists until you learn the value of stealth."[8] However, through the game's role-playing systems, it is possible to develop a character's skills and augmentations to create a tank-like combat specialist with the ability to deal and absorb large amounts of damage.[citation needed] Non-player characters will praise or criticize the main character depending on the use of force, incorporating a moral element into the gameplay.[9]