Ideas for new alien races?

[Sharp]

Well unfortunately the brain met with a plasma accident so I doubt we will ever be sure of the truth.

[Solarius Scorch]

There is one "strictly" canon alien race that is not present in the game: the Aerials. They were featured in the X-Com: Interceptor as ace pilots. We could add them!
Otherwise, it is worth noticing that most, if not all, alien races were based on actual reports from people claiming to have been abducted. Therefore it's strange that we don't have space lizards. Recoloured Tasoths maybe?

[kharille]

Check this wiki and the other alien races at the index on the bottom

https://en.wikipedia.org/wiki/Nordic_aliens

Types of aliens

Alleged UFO-related entities ·
 Energy beings ·
 Grey aliens ·
 Insectoids ·
 Little green men ·
 Nordic aliens ·
 Reptilians
 

Reptilians...  that's basically snakemen.  What about stuff from Dr Who?...

[Solarius Scorch]

Interesting. Let's see:

Energy beings: don't really fit the theme; anyway, they would be dealt with swiftly once you research lasers or plasma.
Grey aliens: no comment.
Insectoids: sort of everyone; they do work as a hive, with the Queen and all. More literally, Chrysalids.
Little green men: not really, although we have very big green men. I wouldn't mind seeing some though.
Nordic aliens: not present in the game. Perhaps these are our aliens' mysterious enemies?
Reptilians: well, Snakemen are this indeed, although the traditional Reptilians are way more humanoid and intelligent; they're supposed to be spies and negotiators.

Also, I'm fairly sure I've seen lookalikes of Floaters and Snakemen, and I think Silicoids, in some TV show on ufology. I might be wrong though, it's been years.