Al Nilsen and Sonic Mania developer Christian Whitehead said they felt the number of additional characters added to the series was problematic, with Whitehead describing the characters as "padding". In 2015, Sega CEO Haruki Satomi acknowledged that Sega had "partially betrayed" the trust of the longtime fans of their games and hoped to focus on quality over quantity. See also Sega development studios Sega AM1 Sega AM2 Amusement Vision Smilebit Notes References External links Software companies based in Tokyo Video game companies established in 1990 Sega divisions and subsidiaries Sonic the Hedgehog Video game companies of Japan Video game development companies Japanese companies established in 1990