Intruder

Released in 1989 by AliceSoft, this title stands alongside "Rance -Searching for Light-" as a monumental adventure game that laid the foundations for the modern bishoujo game industry. The story begins with a daring premise: the protagonist falls in love at first sight with a woman he encounters while walking and decides to break into her mansion. Now available as freeware, this game serves as a valuable historical artifact that showcases the style of system-based adventures from the dawn of Japanese PC gaming.

On a spring day, after falling in love at first sight with a beautiful woman he spots while out for a walk, the protagonist takes the bold step of trespassing into her mansion to get closer to her. As he explores the estate, he encounters mysterious maids and unravels strange secrets, sending the story in an unpredictable direction. With only one night to decide his fate, the player must navigate the mansion's dangers to reach an ending—will he become a criminal, or does another destiny await?