alien action arcade space shooter

A.A.L. is massive arcade action packed into 45 alien spaceships and 10 deadly
ground structures. Shoot whatever moves (or doesn't move for that matter) in 135
planetary systems in 15 empires. Pick up in-game powerups and earn hundreds of
upgrade points to equip your ship with better armor, cooling systems, six-pack missiles,
a terrifying railgun, or your choice of more than a dozen other weapons. Uncover
all the wisdom that is hidden on every planet, fight off wave after wave of
alien aggressors, adjust your strategy to dozens of attack formations, and crack
open all their massive defense installations to wreak havok behind.