Led by Colonel Krag, evil aliens from the planet Leutonia have invaded Europe in 1990 and established the country of New Leutonia. As if that weren't enough, world domination is on the mind of Krag and his minions as they have raided Washington D.C., kidnapping Dr. Barnstorff and his beautiful daughter Jane.

Meanwhile, you -- a brilliant scientist -- have developed a rocket pack that stands as Earth's only hope against the Leutonians. Unfortunately, construction of the pack requires five hard to find elements as well as a fuel called Luneriam, which you don't have yet. Punch and shoot your way through several labs to acquire these items. You must first find them, however, by taking advantage of the faciilities in the War Room. Here, you can send out agents all over the world to try and help you gather essential information.

One man versus an entire alien force may seem to be an impossible mission. But it's all in a day's work for the Rocket Ranger.