Sonic the Hedgehog CD (ソニック・ザ・ヘッジホッグCD Sonikku za Hejjihoggu Shī Dī), or Sonic CD (ソニックCD Sonikku Shī Dī), is a platform video game developed by Sonic Team and published by Sega originally for the Sega CD in 1993. It is the first game in the Sonic series to make use of the CD-ROM format, featuring high quality audio and full motion video. Development began in Japan around the same time as Sonic the Hedgehog 2 in the United States. The games originally had many similarities, but became vastly different projects over time.