Games like UFO Stalker

Here are some great alternatives to UFO Stalker by Spectre17 :
Alien Flying UFO Space Ship
Alien Flying UFO Space Ship
★3.2
UFO RUSH : Alien invasion
UFO RUSH : Alien invasion
★4.2
Alien Guest: UFO arcade
Alien Guest: UFO arcade
★4.3
Celestial Assault
Celestial Assault
★4.0
Alien invasion
Alien invasion
★4.8
Returner 77
Returner 77
★4.2
Alien attack - Galaxy Shooter
Alien attack - Galaxy Shooter
★4.2
Starscape: Rogue-like Shooter
Starscape: Rogue-like Shooter
★4.4
Alien Sniper shooting game
Alien Sniper shooting game
★3.9
DEAD WORLD APOCALYPSE : Zombie
DEAD WORLD APOCALYPSE : Zombie
★3.3
Idle Area 51
Idle Area 51
★4.4
U.F.O. Invasion
U.F.O. Invasion
★4.4
EXILES
EXILES
★3.5
Space War: Idle Tower Defense
Space War: Idle Tower Defense
★4.1
I.F.O
I.F.O
★4.6
Xevion
Xevion
★3.6