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So remember when you're feeling very small and insecure
How amazingly unlikely is your birth
And pray that there's intelligent life somewhere up in space
Cause there's bugger-all down here on Earth

(from)The Galaxy Song Monty Python

Basic Information

An alien is a creature of extraterrestrial origin. They are likely to exhibit Alien Biochemistry.
Also known as a Xenomorph (AGk: 'Strange Form').

This trope generally will not refer to the more prosaic definition of 'alien' … which is basically a synonym for 'foreigner' (as in Resident Alien, Illegal Alien and Enemy Alien).

List of Alien Types and Descriptions

Many of which are also Tropes.

Other Tropes

See Also:


1. GURPS Space - has an excellent system for rolling up random aliens

Game and Story Use

  • Adventure Seed: Jumpgate to Elohi
  • With fantasy or mythological creatures, the players often know what to expect, since the stories revolving around them tend to be common knowledge. Aliens, in contrast, are potentially capable of anything, so use them to surprise the players.
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