The phrase "alien menace" is correct and usable in written English.
It can be used in contexts related to science fiction, discussions about extraterrestrial threats, or metaphorically to describe something perceived as a threat from outside one's own group or society.
Example: "The movie depicted an alien menace that threatened to destroy humanity, forcing the heroes to unite against a common foe."
Alternatives: "extraterrestrial threat" or "foreign menace."
XCOM is a turn-based strategy game in which you command soldiers confronting an alien menace.
Enemy Unknown puts players in command of an international group designed to oppose an alien menace intent on terrorising mankind.
But in the big story of attacking and defeating the alien menace and saving humanity, they can feel like endless throat-clearing and busywork.
When the Timelords exiled the second Doctor to Earth and enforced a regeneration, he joined old friend the Brigadier who gave him a job of Scientific Advisor to the military wing of the United Nations dedicated to defending Earth against the growing alien menace.
The strategy game mixed managing the resources of the cash-strapped organisation with turn-by-turn combat against the alien menace.
In particular, he said, one of the key elements they had wanted to keep was the challenge involved in defending Earth from the alien menace.
Elton John's production company is making "Pride and Predator," a movie in which a giant alien menaces eighteen-century types.
Fredric Jameson's Marxist analysis highlights the polysemy of the shark and the multiple ways in which it can be and has been read from representing alien menaces such as communism or the Third World to more intimate dreads concerning the unreality of contemporary American life and the vain efforts to sanitize and suppress the knowledge of death.
In a rather standard alien-menace maneuver, Čapek's robots outcompete humanity within the new milieu of industrial mass production and attempt to exterminate the human race.
Only one side has a popular national TV host who uses his platform to indoctrinate viewers in the conviction that the President is an alien, totalitarian menace to the country.
Gucci Mane, the rapper who plays Alien's menacing nemesis, was in prison when Korine offered him the job.
