If the player is discovered by the enemy, then a counter will be displayed on the upper right side of the screen that will go down after the enemy has lost track of the player. The enemy can also hear any noise made by the player, which usually occurs when the player punches the wall, fires a non-silenced firearm, uses an explosive, or walks over certain types of terrain. The guards can also turn their heads left or right to see diagonally and move from one screen to another (instead of remaining stationed in one area). Whereas the guards in the previous game could only see in straight lines, the guards in Metal Gear 2 all have a field of vision of 45 degrees. The biggest change in the game was done to the enemy's abilities. As in the original Metal Gear, the player's objective is to infiltrate the enemy's stronghold, while avoiding detection from soldiers, cameras, infrared sensors and other surveillance devices. Metal Gear 2 builds upon the stealth-based game system of its predecessor. Metal Gear 2 Solid Snake for MSX, emulated for DOS, this game runs slow on account that it is emulated twice, if you have fairly powerful CPU it should play OK.

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