Kikokugai: The Cyber Slayer
Kikokugai: The Cyber Slayer is a Japanese cyberpunk eroge visual novel by Nitroplus. It's Nitroplus' third game, and the script is written by Gen Urobuchi. The game is inspired by Chinese wuxia literature of Jin Yong and Gu Long, in particular Sentimental Swordsman, Ruthless Sword (多情劍客無情劍).
The game was remade in 2011 as Kikokugai -Reichin Rinrinshan- with enhanced graphics, a new theme song, and character voices added, and without sex scenes.