Protorions, or alien ghosts, who are determined to wipe out the Galarion
system, have possessed the friendly races of Humans: Tekkos, Kzeos and
Insoids, and have only one thing in their way. A small ship armed to the teeth
and piloted by you. Through eight missions and eighty levels of space shooting
mayhem you will have to prove your courage and defeat the alien bosses.

Alien Outbreak 2: Invasion is a top down shooter where you will battle
waves of enemies and use the power-ups they drop to aid yourself. Your
movement allowance via mouse is horizontal and vertical to three quarters of
the playing field.The power-ups are offensive or defensive in that you will
get upgrades to weapons, secondary missile or explosive weapons and you will
get shields and invisibility spheres.

There are thirty two different types of enemy fighter vessels and eight
different super-boss enemy garrisons. The enemies attack through nine waves
with the tenth wave reserved for the boss battles. Enemy tactics include
random shooting, homed projectiles and mines. The garrisons, naturally, can
release fighter ships to aid in their attack.