The first attack of UFO!
UFOs invasion of Earth was started.
You are only our hope.
Defend Earth against the attack of UFO
brained and bold as time went on and
the attack of their bosses changed
at every moment.
Unfortunately, your missile cannot
get out of earth gravity.
Sometimes your missile can rescue Earth
from UFOs attack by driving UFO back,
and can threaten you.
Only you can defend Earth against
the UFOs attack.
Put your missile into UFO right now!