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The Day The Earth Stood Still

Earth vs The Flying saucers

I Married A Monster From Outer Space

Strange Invaders

Alien Raiders

Alien invaders

X-Tro

Contamination

Starman

Alien Apocalypse

War Of The Worlds

My Stepmother Is An Alien

Alien Nation

Devil Girl From Mars

Invaders From Mars

Invasion Of the Body Snatchers

Invisible Invaders

Plan 9 From Outer Space

The Mysterions

Battle In Outer Space

Space Amoeba

The Quatermas Experiment

Five Million Miles To Earth

Communion

Signs

Target Earth

The Earth Dies Screaming

Not Of This Earth

The Man From Planet X

Kronos

Cosmic Monsters

The Night Caller From outer Space ....Ok, I'll stop! (But there are plenty more) >.<

Predator Franchise

Super 8 Cowboys vs Aliens

Close Encounters of a Third Kind

E.T

Fire in the Sky

The Thing

The Fourth Kind

Skyline

Men In Black franchise

Independence Day

Battleship

Battlefield:LA

Thor

There are hundreds of alien movies.

War of the Worlds (all versions).

Day of the Triffids

Earth Vs. the Flying Saucers

Mars Attacks

The Thing (from another world) (both versions)

Invaders from Mars

Attack of the Killer Tomatoes

...and the list goes on...

More than I have room to list here.