Invasion vs poll

If they all tried to invade earth at the same time, whose going to end up winning control over earth?

The Combines from the half life series

The Demons from the doom series

The Scrins from the triberium wars series

The Zergs from the starcraft series

The Super mutants from the fallout series

The Necromorphs from the dead space series

they are all very different from one another, choose which one do you think might end up winning.

I'm going to go with the Combine. They actually succeeded at taking over Earth where I don't think any of the others did. Got to hand it to a race that can whip us in 6 hours. Also the Super Mutants didn't really "invade" us, they were born here, they are earth citizens, they just don'tlook like you or me.