Maybe
http://www.mangago.me/read-manga/umineko_no_naku_koro_ni_chiru_episode_7_requiem_of_the_golden_witch/
http://www.mangago.me/read-manga/goth/
http://www.mangago.me/read-manga/wolf_guy_ookami_no_monshou/
http://www.mangago.me/read-manga/elfen_lied/
http://www.mangago.me/read-manga/terra_formars/
http://www.mangago.me/read-manga/hoozuki_island/
http://www.mangago.me/read-manga/hideout/
http://www.mangago.me/read-manga/king_of_thorn/
http://www.mangago.me/read-manga/dream_toy_factory/
http://www.mangago.me/read-manga/bloody_junkie/
http://www.mangago.me/read-manga/crime_zone/
http://www.mangago.me/read-manga/btooom/
http://www.mangago.me/read-manga/battle_royale/
http://www.mangago.me/read-manga/ousama_game_renda_hitori/
http://www.mangago.me/read-manga/suicide_island/
http://www.mangago.me/read-manga/bio_meat/
I'm itching for some fantasy gore/horror manga~ something like berserk??