Isaku (遺作) was truly the first of it’s kind and to this day stands out as a mold-shattering PC game. I remember a trip to Japan several years ago and seeing the box for Isaku sitting on the shelf of one of the many adult PC game stores in Tokyo.

Isaku Has Really Stood The Test Of Time When It Comes To PC Hentai Game Villians
What is Isaku you ask? Take a dash of survival horror gameplay, tons of hot “hentai-ish” young schoolgirls, a sprinkle of dating simulation, and a robust point and click style gameplay and there you have it: The first hentai survival horror game, Isaku.

Isaku Pushed The Envelope For Hentai Simulation Adventure PC Games In The 90s
The main objective of the game is to escape from a locked-up school building all while avoiding the evil perverted school gardener, Isaku. On each floor there is a key that helps the player with this task. The keys locations are dependent upon clues that the player must seek out.

Either Get The Schoolgirls Out Of The Locked Building Or Isaku Fucks Them Silly
Now what happens if any of the player’s hot, young female companions get captured? Isaku has a naughty sexy good time with them that is visible via videotape that the player might come across.
Pink Pineapple really were ahead of their time in 1997 and Isaku proved to be a huge hit. It was so much of a hit that 2 sequels spawned from the success, Shusaku (also in 1997), and Kisaku in 2001.











