The 4 Sins is a multi-player escape-room horror game from the first-person perspective. Each player has to cooperate solving the puzzles, stringing the clues and reveiling the truth. The rural environment based on script and scene desgin is restored through series of field work. Narrow street, wall posters of that era, common items on Chinese remote places, all of which construct the Qingshan Town in detail. Meanwhile, interactive items in certain scenes will be more logical in storytelling, so that the riddle part would smoothly match the plot. Each match includes 4 players. When you explore the Qingshan Town, you are bliged to find more information fragments and figure out the riddle together with other players. Each character will have their exclusive experience in role-playing performance. Eveyone is engaged in this interactive film in the end. The 4 Sins contains a fairly long story over one hour. Refinded dubbing material and extended plot context both can help players be delivered concrete perception of what had happened. Besides, there are supplements as well as "serendipity" independent from the main quest, yet thoroughly reflecting the four characters. Sincerely hope that above content render players to connect with characters logically.