What is the/a covenant Empire?

The Covenant Empire, also referred to as The Covenant, are a theoretic hegemony made up of multiple allied and enslaved alien species that controls a large portion of The Milky Way Galaxy. From the video game called “Halo”.

I think played one of those games once.

I think the gould

Oh crap. it's a crossover question. i hate these, because sometimes i accidently choose the wrong one thinking it's within the same universe.