[SUGGESTION] New GAMETYPE! INVASION!

[...] but i get the idea about not wanting to see them spawn, do you want it to be like combat arms cabin fever? like one building out in a swamp fending off in the building and going up to the second level to avoid being swarmed by the monsters?

I've thought of a BIG "Teleporter" (which can't teleport you, but only looks like a Teleporter) and that's where the Dropships fly out, the Aliens jump off and the dropships disappear.
But they could also spawn in houses, where you don't see them spawning or sth like that