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Top 100 alien Games
The Orange Box
Halo 3
Crysis
Spore
Half-Life 2
Serious Sam
Mass Effect 3
Dead Space 2
Gears of War 2
Dead Space
Crysis Warhead
Gears of War
Freedom Force
Homeworld
Heavy Gear II
X-COM
Duke Nukem 3D
Aliens Versus Predator 2
Metroid Fusion
Anomaly
Crysis 2
Metroid
Unreal Tournament III
Enemy Territory
Super Metroid
Unreal Championship
Alien Hominid
Beyond Good and Evil
Thunder Force V
Defense Grid
Space Invaders Extreme
Contra 4
Galaga
Unreal II
Duke Nukem
Cold Space
Commander Keen: Keen Dreams
aliEnd
Star Defender III
Great Little War Game
UFO: Alien Invasion
Farm Story
Rebelstar
Incoming
Duke It Out in D.C.
Contra
Alien Front Online
Serious Sam HD
XCOM: Enemy Within