Fantasy Races and Space Aliens

[MasterTrancer]

R: Fantasy Races and Space Aliens

I'm not really looking for Cthulhu entities either, just beings from another planet, and how do I justify them being from that other planet, rather than on the same planet as the elves and orcs and humans?

Let's try another approach: how is that other planet, compared to Earth? What kind of atmosphere does it have? What about its gravity?

Also, since you mentioned your aliens don't have access to high tech: how they came to Earth?