I solved the problem with aliens killing eachother. Some of them may not be as hostile as others so you may need to greatly outnumber any faction you put them against.
I also added an alternate texture file if you are bored of the same old green aliens. 

Note: In order to encounter more than 1 alien, you must spawn them with command codes or use a mod that spawns them otherwise.

I will continue to update this file as I progress further.



Want to see more of my work? Like my page at https://www.facebook.com/GLITCHEDMATRIX