The Yakyuuken Special (often known by the subtitle Konya wa 12-kaisen) is an adult-themed rock-paper-scissors game released for the Sega Saturn and 3DO in 1995. While it never received an official PlayStation 1 (PS1) release, a difficulty-reduced unlicensed port exists for the platform. Gameplay Mechanics

Because the game was never released outside of Japan, modern players typically access it via ISO files on emulators. Original Format: 1 CD-ROM (NTSC-J). File Size: Approximately 400MB – 600MB (uncompressed).

3DO (1994): Titled The Yakyuuken Special: Konya wa 8-kaisen, featuring 8 models.

Legal & Ethical Note

While the game is out of print and never officially sold outside Japan, downloading ISOs of commercial games occupies a legal gray area. The original copyright holders (Naxat Soft is defunct; Nichibutsu’s current status is complicated) do not see revenue from second-hand sales or ROM sites. Collectors often argue that preserving these games is essential for gaming history, but you should only dump ISOs from discs you legally own.

1. Insert the original PS1 disc into your CD drive.
2. Open ImgBurn → Mode: Read.
3. Select destination file ending in .iso and choose a safe folder.
4. Click the Read icon and wait; verify no read errors.
5. Optionally compute and record the file’s checksum (MD5/SHA256) to confirm integrity.

Legacy: For modern players, the Yakyuken Special ISO serves as a digital artifact of the "multimedia" craze of the mid-90s, where FMV was considered the peak of interactive entertainment before 3D polygon graphics took over. The Yakyuuken Special: Kon'ya wa 12-kaisen!! - PSX