Alien Highway

Gameplay is similar to Highway Encounter, with the player controlling a "Vorton" robot in its attempt to deliver a bomb to an alien base at the end of a highway. Various enemies and obstacles lie in its path. A notable difference is that the player has a single Vorton with an energy meter, instead of five lives; accordingly, the bomb must be pushed by the player, whereas in the previous game it was pushed by the player's spare Vortons. (wikipedia)