? しげの秀一 / 講談社 ? Shuichi Shigeno / KODANSHA All Rights Reserved. Manufactured and produced by SEGA under license from Kodansha Ltd. ? SEGA. All manufacturers, cars, names, brands and associated imagery featured in this game are trademarks and/or copyrighted materials of their respective owners. All rights reserved. The trademarks Porsche, Porsche Crest, Porsche Logotype, Carrera, 911, 718 and Cayman are used under license of Porsche AG.