Name me some Gory Rated R Mecha Anime.?

What is a mecha anime that is very gory lots of action as a kid my cousin brought me this mecha anime with lots of mechs and if they get hit they bleed actual blood. This is the anime i want to watch most as i didn't get the story when i was a kid. But please name me a few. I do not want cheesy animes that are all cute and stuff. I recently grabbed Escaflowne to later found out it was a fox kids show but then there is the japanese dialogue of it which is more gory? Please share your suggestions.