Metal Gear

Metal Gear is an overhead military action-adventure stealth video game originally released in 1987 by Konami for the MSX2 computer standard in Japan and parts of Europe. Considered to be the progenitor of the stealth game genre, it was also the first video game designed by Hideo Kojima, who also directed many of the later Metal Gear sequels. A heavily altered port was produced for the Famicom/NES (without Kojima's involvement), along with a remade version based on the original MSX2 game that was released for the PlayStation 2 as a bonus game in Metal Gear Solid 3: Subsistence and, as a result, is also included in Metal Gear Solid HD Collection and Metal Gear Solid: The Legacy Collection.

The game revolves around a special forces operative codenamed Solid Snake who goes into a solo infiltration mission into the fortified state of Outer Heaven to destroy Metal Gear, a bipedal walking tank capable of launching nuclear missiles from anywhere in the world.

The player must navigate the main character, a military operative codenamed Solid Snake, through various locations, while avoiding visual contact and direct confrontation with patrolling guards. If the player is seen, the game enters the 'Alert Mode.' In this situation, Snake must escape from enemy's sight in order to resume infiltration. The method of escaping varies depending on the circumstances behind discovery: