Gaiares

It’s the year 300x. The Earth has been ravaged by careless humans, leaving an
uninhabitable, polluted wasteland. The space terrorists, Gulfer, plan to
harvest the pollution to make some sort of garbage weapon. The good guys, the
Leezaluth, aren’t happy about that, so they decide they have to blow up the
Earth before Gulfer gets at it. They give Earth an ultimatum: destroy Gulfer
or Leezaluth destroys Earth. To help them out, Leezaluth gives Earth’s last
hero, Dan, a special weapon: the TOZ system.

Why don’t the Leezaluth just stop Gulfer themselves? It’s not exactly clear.

So, we have the premise for a side scrolling shooter. The star attraction here
is the TOZ system. The TOZ is an orb that follows your ship around, and can be
shot at enemy ships to absorb their weapons. Using the TOZ, Dan will fight
through 8 stages filled with lots of enemies and really large bosses.