Ogre

From BoardGameGeek.com:

OGRE and its sequel G.E.V. are tactical ground combat games set in the not-so-distant future. In 2085 A.D., armored warfare continues – faster and deadlier than ever. Hovercraft, tanks and infantry slug it out with tactical nuclear devices. But the most feared weapon of all needs no human guidance. It’s a giant cybernetic tank called the OGRE.

The basic OGRE game gives one player a force of infantry and armor, and a command post he must defend. The other player has only one unit – but it’s an OGRE. It’s an even match. Advanced games allow solitaire or multi-player action, with OGREs on both sides.