Apparently, the only weapon that can destroy the tank are mines.

You would think that the people who developed this game could reasonably assume that other heavy-duty weapons other than mines would damage a tank.

not even those damage the tank

As you progress through Outer Heaven you are sent on further missions and must fight ever more difficult bosses (tanks, men with machine guns, etc).

While not as detailed as Metal Gear Solid (PSX), the original Metal Gear is a game worth playing for fans of the series (to get to experience the origins of the story discussed in later games) as well as for fans of classic Nintendo game.