Region | Title | System | Version | Edition | Languages | Serial | Status |
 | Kyouko no Ijiwaru!! Hachamecha Daishingeki 恭子のいぢわる!! ~ハチャメチャ大進撃~ | FMT | | Original | | |  |
 | Kyouiku & FM Towns Vol. 3 教育&FM TOWNS VOL.3 | FMT | | Hibaihin | | HMC-526 |  |
 | Kyouiku & FM Towns Vol. 2 教育&FM TOWNS VOL.2 | FMT | | Hibaihin | | HMB-520 |  |
 | Kyan Kyan Collection: Daifugouhen KYAN KYAN COLLECTION 大富豪編 | FMT | | Original | | HMA-236 |  |
 | Kusuriyubi no Kyoukasho くすり指の教科書 | FMT | | Original | | WIC-5185 |  |
 | Kousoku: Yorokobi no Aegi 拘束 ~悦びの淫液~ | PC-98 | | Original | | PERS-9512 |  |
 | Kousoku Choujin 拘束超人 | FMT | | Original | | CBF-0006 |  |
 | Kouryuuki 項劉記 | FMT | | with Soundware | | HME-202 |  |
 | Kotoba Asobi: CDView HiP Catch ことばあそび CDVIEW HiP CATCH | FMT | | Original | | HMC-190 |  |
 | Koko wa Rakuensou 2 ここは楽園荘2 | FMT | | Original | | CBF-0004 |  |
 | Koko wa Rakuensou ここは楽園荘 | FMT | | Original | | CBF-0003 |  |
 | Kisou Louga 機装ルーガ | PCE | | Taikenban | | KS3001 |  |
 | Kindan no Ketsuzoku 禁断の血族 | FMT | | Original | | HMF-155 |  |
 | Kikou Shidan: Panzer Division 機甲師団 | FMT | | Original | | HMB-219 |  |
 | Kero Kero Keroppi to Origami no Tabibito けろけろけろっぴとおりがみのたびびと | FMT | | Original | | |  |
 | Katakana no Ehon カタカナのえほん | FMT | | Original | | HMG-104 |  |
 | Kao the Kangaroo | PC | | Sold Out Software | | |  |
 | Kanji no Ehon かんじのえほん | FMT | | Original | | HMD-139 |  |
 | Kanji Land 3-nen 漢字ランド 3年 | FMT | Rev A | Original | | OSL-010A |  |
 | Kanako 香奈子 | PC-98 | | Original | | |  |
 | Kaisoku Tenshi: The Rapid Angel 快速天使 | PSX | | Original | | SLPS 01553 |  |