Fast facts on Sonic! Software Planning
Founded: 1991
Defunct: 1996?
T-series code: T-331
Merged into: Camelot Software Planning
Headquarters: Shinjuku-ku, Tokyo, Japan

Sonic! Software Planning(ソニック) was a Japanese video game developer best known for partnering with Nintendo on many of Nintendo's spin-off franchise games such as Mario Tennis and Mario Golf, as well as the role-playing game series Shining. SSP was originally founded in 1990 as a division of Sega known as Sega CD4 (Consumer Development Studio #4). They changed their name to Sonic! Software Planning, which was formed to create the Shining in the Darkness game for the Sega Mega Drive alongside Climax Entertainment. It also developed other successful games in the franchise like Shining Force: The Legacy of Great Intention and Shining Force II: Ancient Sealing.

In 1995, Sonic! Software Planning officially separated from Sega but agreed to keep developing the Shining games and would not release any games for rival systems that would hurt the Shining franchise. They later established a partnership with Camelot Software Planning, who co-developed the Shining Force III trilogy with them before acquiring them outright.

Softography

Mega Drive

• Shining in the Darkness (1991)
• Shining Force (1992)
• Shining Force II (1993)

Mega CD

• Shining Force CD (1995)

Game Gear

• Shining Force Gaiden (1992)
• Shining Force: The Sword of Hajya (1994)
• Shining Force Gaiden: Final Conflict (1995)

Saturn

• Shining Wisdom (1996)
• Shining the Holy Ark (1997)
• Shining Force III (with Camelot Software Planning, 1997)
• Shining Force III Scenario 2 (with Camelot Software Planning, 1998)
• Shining Force III Scenario 3 (with Camelot Software Planning, 1998)
• Shining Force III Premium Disc (1998)