PLEASE NOTE: 

The main game is SEALED 

The side stories disk IS NOT SEALED. It was removed from the original shrink wrap but never played

The Rebirth album - rebirth is SEALED.

Further information on the rebirth album: 

"key15th" / "clannad10th" Global Collaborative Arrange Album : Rebirth

Fan arrangements of songs from the games "Key" and "Clannad"

This album was unveiled and released at Anime North in Toronto, Canada on May 24, 2014. Physical copies of the album were made available to attendees while free digital copies were also made available globally for download and distribution.

Exactly 1,011 copies of the album were produced in total, though several hundred were destroyed during international shipment to Canada. The mail truck carrying a large number of the disks was struck by lightning, catching on fire. Approximately 530 albums survived for release.