Im getting mixed messages

i read it a few years ago so my memory is a bit hazy
i really don't remember vampires, i just remember a somewhat edgy (in a good way), unique story with many fucked up aliens

yeah they threw in a group of vampires that went around and killed the gantz people, they even killed kurono, but he got brought back later.

i luckily don't remember it, even after looking it up i have to admit that it sounds pretty stupid, but considering that there were onion(?) aliens, it really isn't that bad

yeah the later story got pretty stupid in a lot of places, there ended up being 2 versions of kurono. and they found out they could bring back people that died by getting 100 points, so they bring back a bunch of the people that died earlier on, the world got conquered by some giant aliens that look similar to the blue monkey people from avatar just no blue, then they kick their asses and recover earth, and eventually meet "god"