The Mini-DV "Sin" Tape (DVテープ罪 DV tēpu Tsumi ) is a key item found in Corpse Party. Though obtainable to the player, it is never revealed what contents were inside the tape.
Its contents are unclear. It's possible it contains the video of Naomi hanging Seiko Shinohara, filmed by Taguchi Shougo, and then watched only by Naomi, but during the ritual to appease Sachiko's spirit, it is still possible to offer the Mini-DV Tape to her, causing a bad end.
- The label reads Sin (罪 Tsumi ).