'Combat' - Atari 2600
One of my Atari favorites, though, was called 'Adventure', where you had to return a chalice to the golden castle. It even had big 'cube' dragons!
I think, though, that it was one of the first games that had an "easter egg". If you did a certain combination of moves, you could slip through a hidden door to find the name of the developer. Coooooooool!