Visible minorities have no chance of surviving horror movies, nor do the: cool character, the funny character, the character who probably would survive the movie in real life, and the hot chick.
Also, having a scar makes you evil, being foreign makes you evil. If there is a foreign guy with a scar he is probably the leader of the bad guys.
Guns never jam in combat, for anyone.
Non-vital characters kan never kill the main character. If you hear that the good guy is in your base, and you havent had a big roll in the previous events, you CAN NOT KILL HIM, he has some kind of armor from a wizard. Like the armor that major allied characters in the Call of Duty series.
Also, despite being from completely different galaxies, aliens will usually share characteristics with humans (eyes, ears, nose, mouth, legs, feet, bones, a similar bone structure) There is never a galaxy where the planets require different characteristics to deal with different ecosystems.
Also, all aliens breath oxygen.