Thunderground (Atari 2600 - a2600)
There are six major nuclear bases on the planet's surface. You have to dig into the ground at each of these bases and destroy them. But be careful, they are guarded by patrolling main tanks ranger, if they have in their line of fire will destroy you.
There are two types of tanks. White turret tanks move only through existing tunnels and the only fire at you if there is space between you and them. Blue digger tanks will create their own tunnels to haunt you. There, too, the turret of the tank bottom of the screen that is slowly moving towards your reserve tank. If the tank reaches you stocks before destroying all six bases, you lose a life. The game ends if you lose all lives.
Is an enemy supply buried in random places that if you do get bonus points. Later levels appear at the base of one or no dirt between you and the enemy tanks, leaving them to chase you from the beginning.