LTL7 Prisoner of Stone is an adventure game created by sweet ampoule and is the seventh installment in the LOOP THE LOOP series. The game contains explicit and gruesome content, so discretion is advised. The game is completely free and can be played without any in-app purchases.

The story revolves around a group of students who get sucked into the mysterious LTL, a ruined mine where inexplicable murders happen. The game features a character mystery set in a space where anything desired can be obtained. The characters question their values and morals as they try to escape the dark and hopeless place.

The game is recommended to be played in order with the previous six games in the series, starting with "The House of Gluttony." The game requires a Japanese language-compatible device with touch screen controls. Save data requires an SD card.

Sweet ampoule, also known as "amayaku," is a team that creates visual novels and adventure games. Their notable works include the LOOP THE LOOP series, Dreaming Briar Roses, Whiteboard, Neko Park Waiting, and Devil Only Whispers series.

If you encounter any typos, bugs, or other issues, you can report them through the developer's contact form.