Psychological manga with a lot of gore, or simply horror mangas. Thanks in advance.

Tokyo ghoul, Ajin, Works of Junji ito sensei.

Berserk

http://www.mangago.me/read-manga/uzumaki/

Dorohedoro

I found a good list if you want to read more:
http://www.mangago.me/home/mangalist/38849/

Battle Royale

Thanks.

Bastard! http://www.mangago.me/read-manga/bastard_hwang_youngchan/

The red book http://www.mangago.me/read-manga/the_red_book/

I already read Bastard and it was amazing!

Thanks for the suggestions. ヾ(❀╹◡╹)ﾉ~

ヾ(☆▽☆) no problem! bastard was a great masterpiece, indeed