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1.
A genre of video games wherein the player must avoid direct confrontation and utilize espionage techniques in order to be successful.

Popularized by games like Metal Gear, Tenchu and Thief. Metal Gear Solid was arguably the innovator of the 3D stealth game, with series such as Hitman, Splinter Cell and Assassin's Creed further expanding on the gameplay.
Metal Gear Solid is my favorite stealth action game.
by Ecinsiefil November 09, 2009