- 01/15/98 – NHL ’98
- 01/15/98 – Houkago Renai Club: Koi no Etude
- 01/15/98 – Jung Rhythm
- 01/15/98 – Jungle Park: Saturn Jima
- 01/15/98 – Kindaichi Shounen no Jikenbo: Hoshimitou Kanashimi no Hukushuuki
- 01/15/98 – Mario Mushano no Chou Shougi Juku
- 01/15/98 – Sankyo Fever Jikki Simulation S Vol. 2
- 01/15/98 – Sotsugyou Album
- 01/15/98 – The Star Bowling Vol. 2
- 01/22/98 – Machi
- 01/22/98 – Sentimental Graffiti
- 01/22/98 – Solo Crisis
- 01/22/98 – Wizardry Nemesis
- 01/29/98 – Daikoukai Jidai Gaiden
- 01/29/98 – Farland Saga
- 01/29/98 – Gunblaze S
- 01/29/98 – Honkaku Shougi Shinan Wakamatsu Shougi Juku
- 01/29/98 – Mahou Shoujo Pretty Samy: Heart no Kimochi
- 01/29/98 – Noon
- 01/29/98 – Panzer Dragoon Saga
- 01/29/98 – Photo Genic
- 01/29/98 – Sakamoto Ryuuma: Ishin Kaikoku
- 01/29/98 – Sega Saturn de Hakken!! Tamagotchi Park
- 01/29/98 – Senkutsu Katsuryuu Taisen Chaos Seed
- 01/29/98 – Sokkou Seitokai
- 01/29/98 – Uno DX
- 02/05/98 – Kunoichi Torimonochou
- 02/05/98 – Winter Heat
- 02/11/98 – SD Gundam G Century S
- 02/11/98 – Tenant Wars
- 02/19/98 – Pro Yakyuu Team mo Tsukurou!
- 02/19/98 – Sugobencha: Dragon Master Silk Gaiden
- 02/26/98 – Battle Garegga
- 02/26/98 – Burning Rangers
- 02/26/98 – Doukoku Soshite…
- 02/26/98 – J. League Jikkyou Honoo no Striker
- 02/26/98 – Langrisser: Dramatic Edition
- 02/26/98 – Pachinko Hall Shinsou Daikaiten
- 02/26/98 – Sega Ages Power Drift
- 02/26/98 – Shiroki Majo: Mouhitotsu no Eiyuu Densetsu
- 02/26/98 – Stellar Assault SS
- 02/26/98 – Suchie-Pai Adventure Doki Doki Nightmare
- 02/26/98 – Yuukyuu Gensoukyoku 2nd Album
- 03/05/98 – Denpa Shounen Teki Game
- 03/05/98 – Nile Gawa no Yoake
- 03/05/98 – Virtual Mahjong
- 03/05/98 – Wonder 3 Arcade Gears
- 03/12/98 – The Conveni 2: Zenkoku Chain Tenkai da!
- 03/12/98 – Eve The Lost One
- 03/12/98 – Pia Carrot e Youkoso!!
- 03/12/98 – Time Commando
- 03/12/98 – Zork Collection
- 03/19/98 – Princess Quest
- 03/26/98 – Choro Q Park
- 03/26/98 – Dungeon Master Nexus
- 03/26/98 – House of the Dead
- 03/26/98 – The King of Fighters ’97
- 03/26/98 – Pro Yakyuu Greatest Nine 98
- 03/26/98 – Shinseiki Evangelion: Koutetsu no Girlfriend
- 03/26/98 – Techno Motor
- 03/26/98 – Teitoku no Ketsudan III with Power-Up Kit
- 03/26/98 – Tokimeki Memorial Drama Series Vol. 2: Irodori no Lovesong
- 03/26/98 – Yoshimura Shougi
- 04/02/98 – Dragon Force II: Kami Sarishi Daichi ni
- 04/02/98 – Kumitate Battle Kuttu Ketto
- 04/02/98 – Nobunaga no Yabou Shouseiroku
- 04/02/98 – Sega Ages Phantasy Star Collection
- 04/02/98 – Sound Qube
- 04/02/98 – Waku Waku Puyo Puyo Dungeon
- 04/02/98 – Wangan Trial Love
- 04/02/98 – Winning Post 3
- 04/04/98 – Sakura Taisen 2: Kimi, Shinitamou Koto Nakare
- 04/09/98 – Ayakashi Ninden Kunoichiban Plus
- 04/09/98 – Kidou Senshi Gundam: Giren no Yabou
- 04/09/98 – Nobunaga no Yabou Sengoku Gunyuuden
- 04/09/98 – Riven: The Sequel to Myst
- 04/09/98 – Sotsugyou III Wedding Bell
- 04/09/98 – Tennis Arena
- 04/16/98 – Bomberman Wars
- 04/16/98 – Eiyuu Shigan: Gal ACT Heroism
- 04/16/98 – Savaki
- 04/16/98 – Vampire Savior: The Lord of Vampire
- 04/23/98 – Game de Seishun
- 04/23/98 – Gungriffon II
- 04/23/98 – Himitsu Sentai Metamor V
- 04/23/98 – Super Robot Taisen F Kanketsuhen
- 04/23/98 – Tour Party: Sotsugyou Ryokou ni Ikou
- 04/29/98 – Roommate 3: Ryouko Kaze no Kagayaku Asa ni
- 04/29/98 – Shining Force III Scenario 2: Nerawareta Miko
- 04/29/98 – Super Tempo
- 04/98 – Z
- 05/21/98 – Baroque
- 05/21/98 – Idol Mahjong Final Romance 4
- 05/21/98 – MeltyLancer Re-inforce
- 05/21/98 – Shadows of the Tusk
- 05/21/98 – Super Real Mahjong P7
- 05/28/98 – Grandia Digital Museum
- 05/28/98 – Mujintou Monogatari R: Futari no Love Love Island
- 05/28/98 – Ousama Game
- 05/28/98 – Shoujo Kakumei Utena: Itsuka Kakumei Sareru Monogatari
- 05/28/98 – Super GT 24h
- 06/04/98 – Find Love 2: The Prologue
- 06/05/98 – World League Soccer ’98
- 06/11/98 – AI Shogi 2
- 06/11/98 – Eberouge Special: Koi to Mahou no Gakuen Seikatsu
- 06/11/98 – World Cup ’98 France: Road to Win
- 06/18/98 – Keriotosse!
- 06/18/98 – Langrisser V: The End of Legend
- 06/18/98 – Linda³ Kanzenban
- 06/18/98 – Murakoshi Seikai no Bakuchou Nihon Rettou
- 06/18/98 – Princess Maker: Yumemiru Yousei
- 06/18/98 – Ultraman Zukan 3
- 06/25/98 – Akumajo Dracula X: Gekka no Yasokyoku
- 06/25/98 – Cross Tantei Monogatari: Motsureta Nanatsu no Labyrinth
- 06/25/98 – Game Basic for Sega Saturn
- 06/25/98 – Initial D: Koudou Saisoku Densetsu
- 06/25/98 – Mizuki Shigeru no Youkai Zukan Soushuuhen
- 06/25/98 – Nippon Daihyou Team no Kantoku ni Narou! Sekaihatsu Soccer RPG
- 06/25/98 – Super Adventure Rockman
- 07/02/98 – Another Memories
- 07/02/98 – Druid: Yami-He no Tsuiseki Sha
- 07/02/98 – Motteke Tamago with Ganbare! Kamonohashi
- 07/02/98 – Sega Ages Galaxy Force II
- 07/02/98 – Sol Divide
- 07/09/98 – Code R
- 07/09/98 – Pocket Fighter
- 07/09/98 – Tantei Jinguuji Saburou: Yume no Owari ni
- 07/16/98 – Deep Fear
- 07/16/98 – Elf wo Karu Monotachi II
- 07/23/98 – Highschool Terra Story
- 07/23/98 – Konami Antiques MSX Collection Ultra Pack
- 07/23/98 – Lunar 2 Eternal Blue
- 07/23/98 – Madou Monogatari
- 07/23/98 – Ojousama wo Nerae!!
- 07/23/98 – Radiant Silvergun
- 07/30/98 – Angelique Duet
- 07/30/98 – BackGuiner: Yomigaeru Yuusha-tachi: Kakusei-hen Guiner Tensei
- 07/30/98 – Dream Generation: Koi ka? Shigoto ka!?…
- 07/30/98 – Lovely Pop 2 in 1 Jan Jan Koi Shimasho
- 07/30/98 – Ojousama Tokkyuu
- 07/30/98 – Saturn Music School 2
- 07/30/98 – Waku Waku Monster
- 08/06/98 – Astra Superstars
- 08/06/98 – Doukoku Soshite… Final Edition
- 08/06/98 – Guardian Force
- 08/06/98 – Lupin the 3rd: Pyramid no Kenja
- 08/06/98 – Pro Yakyuu Greatest Nine 98 Summer Action
- 08/06/98 – Wachenröder
- 08/06/98 – Zanma Chouougi Valhollian
- 08/20/98 – Beach de Reach!
- 08/20/98 – ImageFight & Xmultiply: Arcade Gears
- 08/27/98 – Black/Matrix
- 08/27/98 – Capcom Generation: Dai 1 Shuu Gekitsuiou no Jidai
- 08/27/98 – Mahoutsukai ni Haru Houhou
- 09/03/98 – Slayers Royal 2
- 09/17/98 – Gensou Suikoden
- 09/17/98 – Simulation RPG Tsukuru
- 09/23/98 – Capcom Generation: Dai 2 Shuu Makai to Kishi
- 09/23/98 – Digital Monster Ver. S Digimon Tamers
- 09/23/98 – Kidou Senkan Nadesico: The Blank of 3 Years
- 09/23/98 – The Legend of Heroes I & II Eiyuu Densetsu
- 09/23/98 – Mahjong Gakuensai DX: Zenjitsu ni Matsuwaru Funsenki
- 09/23/98 – Shining Force III Scenario 3: Hyouheki no Jashinguu
- 09/23/98 – Sorvice
- 09/23/98 – Steam-Heart’s
- 10/01/98 – BackGuiner: Yomigaeru Yuusha-tachi: Hishou-hen Uragiri no Senjou
- 10/01/98 – Densha de Go! EX
- 10/01/98 – Hatsukoi Monogatari
- 10/01/98 – Sakura Tsuushin
- 10/08/98 – Cotton Boomerang
- 10/08/98 – Kidou Senshi Gundam: Giren no Yabou – Kouryaku Shireisho
- 10/08/98 – Pia Carrot e Youkoso!! 2
- 10/15/98 – Capcom Generation: Dai 3 Shuu Koko ni Rekishi Hajimaru
- 10/15/98 – Sega Ages I Love Mickey Mouse…/ I Love Donald Duck…
- 10/22/98 – Mizubaku Daibouken
- 10/22/98 – Rox 6=Six
- 10/22/98 – Strikers 1945 II
- 10/27/98 – Marvel Super Heroes vs. Street Fighter
- 10/29/98 – Falcom Classics II
- 10/29/98 – Honkaku Hanafuda
- 10/29/98 – Segata Sanshirou Shinken Yuugi
- 10/29/98 – Virtuacall S
- 11/05/98 – Real Mahjong Adventure “Umi-He”: Summer Waltz
- 11/05/98 – Shinseiki Evangelion: Eva to Yukai na Nakamatachi
- 11/12/98 – Capcom Generation: Dai 4 Shuu Kokou no Eiyuu
- 11/19/98 – She’sn
- 11/19/98 – Shichisei Toushin Guyferd: Crown Kaimetsu Sakusen
- 11/26/98 – Baldy Land
- 11/26/98 – Find Love 2: Rhapsody
- 11/26/98 – Idol Janshi Suchie-Pai Mecha Genteiban: Hatsubai 5 Shuunen (Toku) Package
- 11/26/98 – Sankyo Fever Jikki Simulation S Vol. 3
- 11/26/98 – Wizardry Llylgamyn Saga
- 11/26/98 – Étude Prologue: Yureugoku Kokoro no Katachi
- 12/03/98 – Capcom Generation: Dai 5 Shuu Kakutouka-tachi
- 12/03/98 – Winning Post 3 Program ’98
- 12/03/98 – Zoku Hatsukoi Monogatari: Shuugakuryokou
- 12/10/98 – My Fair Lady: Virtual Mahjong II
- 12/10/98 – Noël 3
- 12/10/98 – Ruriiro no Yuki
- 12/10/98 – Yuukyuu Gensoukyoku Ensemble
- 12/17/98 – Farland Saga: Toki no Michishirube
- 12/17/98 – Yoshimoto Mahjong Club
- 12/23/98 – 6 Inch My Darling
- 12/23/98 – Girl Doll Toy: Tamashii wo Kudasai
- 12/23/98 – Sakura Taisen Teigeki Graph
- 1998 – Dragon’s Dream