The first and second title in the METAL GEAR series that established the stealth action genre, as well as the basic mechanics of the series.
The 1987 original game introduced core stealth mechanics that were groundbreaking for the time. Players could avoid detection by crouching, using the environment for cover, and relying on stealth over combat - a stark contrast to the run-and-gun action games prevalent then. These innovative gameplay elements established the series as a pioneer in the stealth action genre.
The 1990 sequel built upon the stealth mechanics, introducing new abilities like crawling. This expanded the flexibility in player approach and evasion. The game also featured a radar to track enemy locations and the ability to intentionally attract guards by making noise, further deepening the strategic depth of the stealth gameplay.
Rather than relying on combat, the games encouraged players to accomplish objectives through stealth and avoidance. This design philosophy challenged the conventional action game norms, offering a fresh and innovative approach to gameplay.
The expansive environments required careful observation and experimentation. Players had to interact with the environment, such as punching walls to find hidden passages or using items to distract enemies, in order to progress.
While praised for its stealth mechanics, the games received criticism for their sometimes obtuse and challenging progression. Players often had to engage in extensive backtracking and trial-and-error to discover the correct path forward, which could be frustrating for modern audiences.
The series' pioneering stealth mechanics and emphasis on non-violent gameplay have left a lasting impact on the industry, serving as a foundation for numerous subsequent stealth-focused titles and inspiring developers to experiment with alternative gameplay approaches.