In Metal Gear, the player controls an army officer codenamed Solid Snake, then invades the enemy’s base. To keep him safe, Solid Snake needs to move carefully to avoid the attention of the guards. If an intruder is detected, the alert system in the base of the enemy is activated. Players need to quickly escape the sight of enemies and continue to perform the mission. He will escape the attention of the enemy depends on each case. If he sees a single exclamation mark appearing on an enemy’s head, he can escape by moving to the next area to limit their view. However, if two exclamation points appear on the head of the enemy or a loud sound is emitted on the infrared sensor, Snake can only escape by destroying all enemies approaching and going out or into the elevator.
