Here is the full list of all 9 Hentai Casual Slider achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Pause the game for the first time.
Play five puzzles in Hentai Casual Slider.
Play four puzzles in Hentai Casual Slider.
Play three puzzles in Hentai Casual Slider.
Play two puzzles in Hentai Casual Slider.
Cheat for the first time.
Play your first puzzle
Open the Gallery for the first time.
Thank you for playing Hentai Casual Slider!