1)   Alien Sky 1.9.1
Make a raid deep into alien force positions to eliminate the threat for your homeworld. You'll encounter lots of different alien ships, upgrade your weaponry with extra-weapons, blow up enemy barriers and defeat powerful bosses.
action, arcade, space, space-shooter, alien, ship, shooter,

 2)   Atomaders 1.11.5
You have to liberate your planet system from alien invasion using your spacefighter. Player can obtain various extra-weapons and special abilities by destroying enemy cyborgs, fighters and motherships. Each planet has its own cyborgs and bosses.
space-shooter, spacefighter, invaders, action, spaceship,

 3)   Trash Killer 2 2.0.7
Funny freeware space-shooting arcade in which you have to clean up the galaxy from the asteroids using the laser cannon mounted on your spaceship. Some asteroids give you useful power-ups increasing weapon power or restoring health.
action, arcade, space, space-shooter, ship, shooter, asteroids,

 4)   Atomaders 2 1.0.4
You have to prevent cyborg invasion to your homeworld. Make use of enemy weaponry, find vulnerable spots of colossal command ships, take control of enemy teleportation system - defend the human race by any available means.
arcade, space-shooter, spacefighter, invaders, action, spaceship, cyborg, cyborgs,