[Request] Hack n Slash anime!

blood++ xD

Berzerk :)

animefreak.tv

sengoku basara

Sengoku Basara just finished. 2010 2nd season. >< Good Anime too!

Sengoku Basara has awesome battle scenes

Boku n^W.
...

Elfen Lied. Plenty of hack, not sure about slash, though.

/hack//sign ? its about a kid stuck inside an MMORPG called 'The World' or something like that haven't seen it in years so I can't recall. It was rather good tbfh, I also played the PS2 games for it they were rather entertaining :D