Featured in the games Metal Gear (MSX, NES, Commodore 64), Metal Gear 2: Solid Snake (MSX), Metal Gear Solid (PS, PC), and Metal Gear Solid 2: Sons of Liberty/Substance (PS2, Xbox), Metal Gear Solid: The Twin Snakes (GC) and Metal Gear Solid 3: Snake Eater (PS2).
"Now you shall bear witness to the demon weapon that will drag the world into the 21st century!"
2. Used as a mocking expression (spoken in a rough manly voice) when someone repeats what another person just said as a question (Much like solid snake does in the metal gear series).
"It's called Metal Gear"
"Hey look, a Plane"
Metal Gears also serve the role of assault, artillery, anti-vehicle, anti-personell, escort, theatre-missile-defence, as well as numerous other functions with their heavy armaments. The numerous models over the decades have been armed with heavy machine-guns, rockets, hellfire missles, laser systems, rail-guns, hydro-cannons, and various other conventional and unconventional weapons.
In addition to carrying ICBMs, Metal Gears have been known to carry cluster-bombs, cruise missiles, and various other assault payloads in its missile tubes.
The Metal Gear is a fictional weapon-system.