Classic.
Metal Gear Solid was the first in the series to be released on the Playstation console. At the time of its release, this game set a new standard for the depth of quality an action game could have. It had a deep story involving multiple characters who were all well portrayed with full audio dialogue. The gameplay consisted mainly of stealth action that was well executed for the first time in gaming history. Gun fights were always an option, but the game promoted sneaking through the levels, not only to coincide with the story, but also to attain a higher ranking at the end. Graphically, the game was the epitome of what a game could look like on the PlayStation console. Overall, this game was excellent, and still worth playing through today if you can find a copy.