After colonizing the planet Solo of the Andromeda galaxy, earthling scientists uncover ancient mechanisms built by a lost civilization from long ago. They name this vanished culture the Sixth Civilization as it is the sixth example of intelligent alien life the human race has encountered. What the earthlings do not realize, however, is that they are soon to encounter the seventh: the Buff Clan, humans from a world other than Earth who have come seeking a legendary power source known as the Ide. Fortuitously, just as first contact with the Buff Clan turns violent, the earthlings discover that the mechanisms of the Sixth Civilization can combine to create a giant mecha called Ideon powerful enough to protect them. But is Ideon in fact the power source of legend, and what is the extent of its might? The earthlings can only hope to discover the answer before it is too late.
You can't get more "Kill em' All" Tomino than these two ... both can be a hit or miss though, I personally didn't like Victory too much but loved Ideon. I'm sure many are different on that, or may agree, might love or hate both, etc! All in all though if you want brutally grim Tomino shows, these are it.