| Sega Saturn CD |  Jung Rhythm | 1998 | Altron Corp. |
| Sega Saturn CD | Jungle Park - Saturn Shima Model T-18008G | 1998 | BMG Japan, Inc. Japan |
| Sega Saturn CD | Jungle Park - Saturn Shima Model T-18009G | 1998 | BMG Japan, Inc. Japan |
| Sega Saturn CD | Keriotosse! | 1998 | Masudaya Corp. Japan |
| Sega Saturn CD | Kidou Senkan Nadesico - The Blank of 3 Years | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou - Kouryaku Shireisho Model T-13333G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou Model T-13327G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou Model T-13330G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Kindaichi Shounen no Jikenbo - Hoshimitou Kanashimi no Fukushuuki | 1998 | Hudson Soft. Hudson Group Japan |
| Sega Saturn CD | Kochira Katsushikaku Kameari Kouenmae Hashutsujo Nakagawa Land Dai Race! no Maki Model T-13332G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Koden Koureijjyutsu Hyaku Monogatari - Hontoni Atta Kowai Hanashi Satakore | 1998 | Hudson Soft. Hudson Group Japan |
| Sega Saturn CD |  Koei Best Collection: Taikou Risshiden II Model T-7667G | 1998 | KOEI Co., Ltd. Japan |
| Sega Saturn CD | Konami Antiques MSX Collection Ultrapack Model T-9530G | 1998 | Konami Co., Ltd. Japan |
| Sega Saturn CD | Koudou Saisoku Densetsu - Kashiramoji D - Initial D | 1998 | ASK Kodansha Co., Ltd. Japan |
| Sega Saturn CD | Kumitate Battle - Kuttu Ketto Model T-1813G | 1998 | Tecno Soft. TechnoSoft Japan |
| Sega Saturn CD | Kunoichi Torimonochou Model T-6803G | 1998 | CRI CSK Research Institute Japan |
| Sega Saturn CD | Langrisser - Dramatic Edition | 1998 | NCS Corp. Nippon Computer Systems Japan |
| Sega Saturn CD | Langrisser III Satakore | 1998 | NCS Corp. Nippon Computer Systems Japan |
| Sega Saturn CD | Langrisser IV Satakore | 1998 | NCS Corp. Nippon Computer Systems Japan |
| Sega Saturn CD | Langrisser V - The End of Legend | 1998 | NCS Corp. Nippon Computer Systems Japan |
| Sega Saturn CD | Linda³ - Kanzenban | 1998 | ASCII Corp. Japan |
| Sega Saturn CD | Lovely Pop 2 in 1 Jan Jan Koi Shimasho | 1998 | Visco Corp. Kyoto, Japan |
| Sega Saturn CD | Lunar 2 - Eternal Blue Model T-27906G | 1998 | Kadokawa Shoten Japan |
| Sega Saturn CD | Lupin Sansei - Pyramid no Kenja | 1998 | Asmik Ace Ent., Inc. Japan |
| Sega Saturn CD | Machi Model T-34001G | 1998 | Chun Soft |
| Sega Saturn CD | Madou Monogatari | 1998 | Compile |
| Sega Saturn CD | Magic Knight Rayearth Model T-12706H | 1998 | Working Designs |
| Sega Saturn CD | Magical Drop III - Toretate Zoukangou! Sega Saturn Collection Model T-1318G | 1998 | Data East Corp. Japan |
| Sega Saturn CD | Magical Night Dreams Cotton Boomerang | 1998 | Success Japan |
| Sega Saturn CD | Mahjong Gakuen-sai DX - Zenjitsu ni Matsuwaru Funsenki | 1998 | Make Soft., Inc. Japan |
| Sega Saturn CD | Mahou Shoujo Pretty Samy - Heart no Kimochi Model T-20112G | 1998 | Nec InterChannel, Ltd. Japan |
| Sega Saturn CD | Mahoutsukai ni Naru Houhou Model T-32510G | 1998 | TGL Technical Group Laboratory Japan |
| Sega Saturn CD | Marvel Super Heroes vs. Street Fighter P | 1998 | Capcom Co., Ltd. Japan |
| Sega Saturn CD |  Maximum Force Model T-25417H-50 | 1998 | GT Interactive Soft. Corp. NY, USA |
| Sega Saturn CD | Meltylancer Re-inforce Model T-15038G | 1998 | Imadio Japan |
| Sega Saturn CD | Meltylancer Re-Inforce Special Edition Model T-15039G | 1998 | Imadio Japan |
| Sega Saturn CD | Message Navi Vol. 2 | 1998 | SIMS Co., Ltd. Japan |
| Sega Saturn CD | Mizubaku Daibouken Model T-19910G | 1998 | Ving Japan |
| Sega Saturn CD | Mizuki Shigeru no Youkaizukan Soushuuen | 1998 | ASK Kodansha Co., Ltd. Japan |
| Sega Saturn CD | Mogitate SegaSaturn Vol. 2 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
