Known as the first stealth-action game, Metal Gear tells the tale of Solid Snake, a rookie operative of the U.S. special forces unit FOXHOUND, as he infiltrates Outer Heaven, a fortified military compound, to destroy a mysterious superweapon known as "Metal Gear".
Heiankyo Alien is a 1979 maze game originally developed and released for the NEC PC-8001 and for for arcades. It is the first "trap 'em up" game and the first game to feature a digging mechanic.