THUNDERGROUND / Sega / Atari 2600
Thunderground is an odd combo of Combat and Dig-Dug that's nowhere as good as either. You guide a vehicle through dirt as it tries to asplode a series of reactors that are guarded by tanks. The game suffers most from an almost complete lack of difficulty, as the tank enemies are slow, stupid and don't even seem to have any idea where you are on the screen. As the game progresses you see different colored tanks that can also dig through the dirt like you can, but they never seem to get any smarter or even much faster.