| 'K' Companies | Period (Timeline) | Item #: Game | Item #: Non-Game |
|---|---|---|---|
| K & P [Kamata & Partners] | 1998 to 1999 (2 years) | ||
| K&G Games | 1987 (1 year) | ||
| K&K Soft | 1991 (1 year) | ||
| K'Soft | 1984 to 1987 (4 years) | ||
| K-12 MicroMedia | 1980 to 1983 (4 years) | ||
| K-Byte | 1981 (1 year) | ||
| K-River Amusement [Korea] | 2006 (1 year) | ||
| K-Soft | 1986 (1 year) | ||
| K-T Mfg. Co. | |||
| K-Tek Soft. | 1983 (1 year) | ||
| K-Tel International, Ltd. [UK] | 1983 to 1984 (2 years) | ||
| K-Tel Vision | 1982 (1 year) | ||
| K. & E. Novelty Co. [San Jose, CA, USA] | 1932 (1 year) | ||
| K. & H. Game Co. | |||
| K. & S. Sales Co. [Chicago, IL, USA] | 1932 to 1933 (2 years) | ||
| K1soft | 2002 to 2004 (3 years) | ||
| K2 | 2002 (1 year) | ||
| K7 Kursaal | 1994 (1 year) | ||
| KA [Paris, France] | 1982 (1 year) | ||
| Ka Sheng | 1992 to 2001 (10 years) | ||
| Kabam Games, Inc. | 2014 to 2019 (6 years) | ||
| Kaboom Games | 2016 (1 year) | ||
| Kabosu | |||
| Kabs Informatique [Carcassonne, France] | 1982 (1 year) | ||
| Kabuto Factory | 2011 to 2017 (7 years) | ||
| KAC [K.Amusement Lising Co.] [Japan] | 1986 to 1993 (8 years) | ||
| Kadokawa Games, Ltd. [Japan] | 2012 to 2022 (11 years) | ||
| Kadokawa Shoten [Japan] | 1995 to 2012 (18 years) | ||
| Kaemmerer, Markus | 1994 (1 year) | ||
| Kaesmacher, Andre | 2001 (1 year) | ||
| Kaga Amusement Co., Ltd. [Japan] | 2007 (1 year) | ||
| Kaga Create Co., Ltd. [Japan] | 2009 to 2015 (7 years) | ||
| Kaga Tech | 2000 to 2001 (2 years) | ||
| Kagesan | 2015 to 2018 (4 years) | ||
| Kaiko | 1994 (1 year) | ||
| Kaina Games | 1982 (1 year) | ||
| Kaiser & Cushion [UK] | 1914 (1 year) | ||
| Kaiser Corp. [China] | 1987 to 1988 (2 years) | ||
| Kaiser Electro-Optics, Inc. | 1994 (1 year) | ||
| Kaiser Spiele [Gauselmann Group] [Germany] | 2010 (1 year) | ||
| KAJ | 1999 (1 year) | ||
| KAJOT | 2002 (1 year) | ||
| Kakao Games Corp. | 2013 to 2020 (8 years) | ||
| Kaken [Japan] | 1992 (1 year) | ||
| Kakizaki [Japan] | 1978 (1 year) | ||
| Kalamazoo Automatic Music Co. [Kalamazoo, MI, USA] | 1934 to 1935 (2 years) | ||
| Kalamba Games, Ltd. | |||
| Kalisto Ent. | 2001 (1 year) | ||
| Kalkomat [Krakow, Poland] | 2004 to 2011 (8 years) | ||
| Kalva Venders, Inc. [Chicago, IL, USA] | |||
| Kalypso Media GmbH | 2008 to 2024 (17 years) | ||
| Kam's Soft [Japan] | 1991 (1 year) | ||
| Kama Digital Ent. [Korea] | 1998 to 2000 (3 years) | ||
| Kamejima Sangyou | 1993 (1 year) | ||
| Kaminski & Lieblich | 1985 (1 year) | ||
| Kamiya [Japan] | 1980 to 1984 (5 years) | ||
| Kammen, J. [Cleveland Heights, OH, USA] | 1932 (1 year) | ||
| Kaneko Co., Ltd. [Tokyo, Japan] | 1982 to 2002 (21 years) | ||
| Kaneko USA, Ltd. [IL, USA] | 1990 to 1994 (5 years) | ||
| Kangas, Marcus K. | 1990 (1 year) | ||
| Kangnam [Korea] | 1989 (1 year) | ||
| Kankodori Co. | 1991 (1 year) | ||
| Kankyouken | |||
| Kansai Enterprise Co., Ltd. [Japan] | 1975 (1 year) | ||
| Kansai Kigyou | 1977 to 1978 (2 years) | ||
| Kansas City Systems | 1983 to 1986 (4 years) | ||
| Kansas City Talking Machine Co. [Kansas City, MO, USA] | 1899 (1 year) | ||
| Kansas Soft. | 1981 (1 year) | ||
| Kantronics | 1982 to 1984 (3 years) | ||
| Kanzaki Syncetic Laboratories [Japan] | |||
| Kapusta, Philip P. | 1992 to 1996 (5 years) | ||
| Kara Computer Graphics | 1990 to 1991 (2 years) | ||
| Karabin, G. | 1983 to 1984 (2 years) | ||
| Karam Trading Co., Ltd. [Korea] | 1992 to 1993 (2 years) | ||
| Karateco [Tokyo, Japan] | 1980 to 1983 (4 years) | ||
| Kare Technology | |||
| Karlchen | 1988 (1 year) | ||
| Karlchen & Opossum | 1989 (1 year) | ||
| Karlin, Paul | |||
| KarmaSoft | 1990 (1 year) | ||
| Karmody | 2003 (1 year) | ||
| Karolina Games | |||
| Karom Golf Table Corp. [Pulaski, NY, USA] | 1931 to 1932 (2 years) | ||
| Karoshi Corp. | 2003 to 2009 (7 years) | ||
| Karshedan Soft. | 1989 (1 year) | ||
| Karsten, R. | 1985 (1 year) | ||
| kas29 | 2014 to 2016 (3 years) | ||
| KASCO [Kansai Seiki Seisakusho Co.] [Japan] | 1959 to 1991 (33 years) | ||
| Kaser Soft., Everett | 1989 to 1999 (11 years) | ||
| Kashiya | 1991 (1 year) | ||
| Kashkishka | 1997 to 1998 (2 years) | ||
| Kastell [Robert Kastell] | 1954 (1 year) | ||
| Kasten, H. | 1952 (1 year) | ||
| Katan, Fouad | 1984 (1 year) | ||
| Kato Seisakujo Co., Ltd [Japan] | 1981 to 2005 (25 years) | ||
| Katsura, Eiji | 1984 (1 year) | ||
| Katto Cracking | 1988 (1 year) | ||
| Katty [Japan] | 1993 (1 year) | ||
| Kauda Project | 1991 (1 year) | ||
| Kaudelka O. | 1987 (1 year) | ||
| Kaufmann Fréres [France] | 1909 (1 year) | ||
| Kawada | 1986 to 1990 (5 years) | ||
| Kawaguchiya Co., Ltd. [Japan] | 1987 (1 year) | ||
| Kawai | 1984 to 1989 (6 years) | ||
| Kawai Gakki Seisakushou | 1993 (1 year) | ||
| Kawakusu, Ltd. | 1982 to 1990 (9 years) | ||
| Kawasaki Electric Co., Ltd. [Japan] | |||
| Kay Enterprizes Co. | 1982 (1 year) | ||
| Kayde Soft. | 1983 (1 year) | ||
| Kaye Mfg. Co. | 1953 (1 year) | ||
| Kaye Sales Co., Inc., Irving [Brooklyn, NY, USA] | 1957 to 1967 (11 years) | ||
| Kaye Sales Corp., Irving [Brooklyn, NY, USA] | 1966 to 1968 (3 years) | ||
| Kayem Products Co., Inc. [Los Angeles, CA, USA] | 1940 to 1948 (9 years) | ||
| Kaypro Corp. [Solana Beach, CA, USA] | 1984 to 1985 (2 years) | ||
| Kaze | 1995 to 2001 (7 years) | ||
| Kazuki | |||
| Kazumi | 1993 (1 year) | ||
| Kazutome | 1984 (1 year) | ||
| Kazz [Japan] | 1991 (1 year) | ||
| KBS | 1993 to 1994 (2 years) | ||
| KCCK Designs | 1996 (1 year) | ||
| KCS [Kolff Computer Supplies BV] | 1984 to 1985 (2 years) | ||
| KCT Media [Korea] | 1998 to 1999 (2 years) | ||
| KD Office [Japan] | 1989 (1 year) | ||
| KDD [Japan] | |||
| KDG Mobrey | |||
| KDS [Russia] | 2011 to 2014 (4 years) | ||
| KDS Electronics | 1989 (1 year) | ||
| Keane Novelty Co. [Chicago, IL, USA] | 1891 to 1892 (2 years) | ||
| Kecmo | 1994 to 1995 (2 years) | ||
| Kee Games | 1973 to 1978 (6 years) | ||
| Keefer, Steve | 1974 (1 year) | ||
| Keeney & Co., J.H. [Chicago, IL, USA] | 1931 to 1963 (33 years) | ||
| Keeney & Sons, Inc. [Chicago, IL, USA] | 1927 to 1940 (14 years) | ||
| Keep Publishing | 1987 (1 year) | ||
| Keesee, Frank P. [Toronto, Canada] | 1897 (1 year) | ||
| Kegel, Hugo W. [Dresden, Germany] | 1928 (1 year) | ||
| Kegler & Burk [Germany] | 1934 (1 year) | ||
| Kehoe Soft. | 1988 (1 year) | ||
| Kei-H | 1992 (1 year) | ||
| Keibunsha | 1996 (1 year) | ||
| Keikakudo [Japan] | 1996 (1 year) | ||
| Keil, Andreas | 1974 (1 year) | ||
| Keima | 1993 to 1994 (2 years) | ||
| Keisokugiken [Japan] | |||
| Keith, H.M. [Spokane, WA, USA] | 1938 (1 year) | ||
| Kel-Chad, Inc. [Crystal Lake, IL, USA] | |||
| Kelix Soft. Systems | |||
| Keller, Mark S. | 1980 to 1981 (2 years) | ||
| Keller, P. [Springfield, MS, USA] | 1900 (1 year) | ||
| Kelley Mfg. Co. [Chicago, IL, USA] | 1901 to 1920 (20 years) | ||
| Kelley Novelty Co., The [Chicago, IL, USA] | 1932 (1 year) | ||
| Kellogg & Co. [New York, NY, USA] | 1888 (1 year) | ||
| Kellogg's | 1994 to 2022 (29 years) | ||
| Kellogg, Don | 1995 (1 year) | ||
| Kelly Co., W.H. [Tulsa, OK, USA] | 1938 (1 year) | ||
| Kelly Gum & Mfg. Co. | 1904 (1 year) | ||
| Kelly Novelty Co. [Chicago, IL, USA] | 1932 (1 year) | ||
| Kellydata [Norway] | |||
| Kelsoft | 1987 (1 year) | ||
| Kelton | 1998 (1 year) | ||
| Kemco America, Inc. [USA] | 1992 to 1996 (5 years) | ||
| Kemco, Ltd. | 1985 to 2024 (40 years) | ||
| Kemco-Seika [USA] | 1988 to 1991 (4 years) | ||
| Kemeny, John George | 1965 (1 year) | ||
| Kemo Novelty Co. [West Allis, WI, USA] | 1932 (1 year) | ||
| Kemp, Clarence [Baltimore, MD, USA] | 1889 (1 year) | ||
| Kempsoft | 1983 (1 year) | ||
| Kemsoft | 1984 (1 year) | ||
| Ken1 | |||
| Kenda Electronic Systems | 1985 (1 year) | ||
| Kendall & Walters | 1983 (1 year) | ||
| Kendall & White | 1984 (1 year) | ||
| Kendall & Wiseman | 1983 (1 year) | ||
| Kendall, Stanley | 1982 to 1986 (5 years) | ||
| Kendall, Steven | 1984 (1 year) | ||
| Kenema Associates | 1983 (1 year) | ||
| Kenga | |||
| Kenix Soft. [Japan] | 1996 (1 year) | ||
| Kennedy & Diss [Brooklyn, NY, USA] | 1889 to 1890 (2 years) | ||
| Kenner | 1978 to 1981 (4 years) | ||
| Kenphone Electronics | 1983 (1 year) | ||
| KenSingTon | 2007 (1 year) | ||
| Kent & Birmingham | 1974 (1 year) | ||
| Kent Micro Computers | 1985 (1 year) | ||
| Kentucky Gum Co. [Louisville, KY, USA] | 1934 (1 year) | ||
| Kenyon, Inc. | 1939 (1 year) | ||
| Kepler Interactive | 2023 to 2024 (2 years) | ||
| Kerekes, Tibor | 1986 (1 year) | ||
| Kerian | 1984 (1 year) | ||
| Kern, G. [Peru, IL, USA] | 1916 (1 year) | ||
| Kernan Mfg. Co., D. [Chicago, IL, USA] | 1897 to 1901 (5 years) | ||
| Kero Makura [Japan] | 2013 (1 year) | ||
| Kerr, R. | 1984 to 1985 (2 years) | ||
| Kersten & Partner [Germany] | 1982 to 1984 (3 years) | ||
| Kerszi | 1986 (1 year) | ||
| Kertesz, Bela | 1987 (1 year) | ||
| Kerwin Soft. | 1988 (1 year) | ||
| Kessler, Louis | 1975 (1 year) | ||
| Kev Soft | 1986 to 1989 (4 years) | ||
| Kewa, S.A. | |||
| Key [Japan] | 2018 (1 year) | ||
| Keyne, J. | |||
| Keynet, Inc. [Japan] | 2001 (1 year) | ||
| Keypunch Soft. | 1986 to 1989 (4 years) | ||
| Keyser, Earl | 1978 (1 year) | ||
| Keysoft | 1982 to 1983 (2 years) | ||
| Keystone Engineering Co. [St. Louis, MO, USA] | 1933 (1 year) | ||
| Keystone Novelty & Mfg. Co. [Philadelphia, PA, USA] | 1920 to 1927 (8 years) | ||
| Keystone Novelty & Sales Co. [Indianapolis, IN, USA] | 1928 (1 year) | ||
| Keystone Novelty Mfg. Co. [Chicago, IL, USA] | 1932 to 1933 (2 years) | ||
| Keystone Sales Co. [Chicago, IL, USA] | 1931 (1 year) | ||
| KF [Kaufmann Frères] [France] | 1909 (1 year) | ||
| KFC | 2003 (1 year) | ||
| KG Soft [Japan] | |||
| KGS | 1996 (1 year) | ||
| KH Scriven | 1986 (1 year) | ||
| KH Video | 1989 (1 year) | ||
| Khan Games | 2015 (1 year) | ||
| Kharkov | 1989 (1 year) | ||
| Khobey Soft. | 1988 (1 year) | ||
| KIC [Japan] | 1991 (1 year) | ||
| KickStart [Germany] | |||
| KID [Kindle Imagine Develop] | 1991 to 2005 (15 years) | ||
| Kiddie Rides Amusement Co. [New York, NY, USA] | 1952 (1 year) | ||
| Kiddielane Mfg. Corp. [Westbury, NY, USA] | 1961 (1 year) | ||
| Kiddinx Studios GmbH [Berlin, Germany] | 2001 to 2007 (7 years) | ||
| Kiddisoft | 1985 to 1986 (2 years) | ||
| Kidmann [Spokojna, Poland] | |||
| Kids Station | 2003 to 2004 (2 years) | ||
| Kids Station Toys, Inc. | 2010 (1 year) | ||
| Kidsplay | 1986 (1 year) | ||
| KidStuff Soft. | 1993 to 1995 (3 years) | ||
| KIDware | 1986 to 1989 (4 years) | ||
| Kigyo Corp. [Taiwan, ASIA] | 1996 (1 year) | ||
| KIK [France] | 1936 (1 year) | ||
| KiKi Co., Ltd. [Japan] | 2002 (1 year) | ||
| Kilday Associates, J.C. | 1983 (1 year) | ||
| Kilger | 1952 (1 year) | ||
| Kill Or Die | 1991 to 1992 (2 years) | ||
| Killer Rats Association | 1987 to 1988 (2 years) | ||
| Killits, Miner L. [St. Louis, MO, USA] | 1904 (1 year) | ||
| Kim's Media [Korea] | 2001 (1 year) | ||
| Kimble [Ireland, EU] | |||
| Kimsey Mfg. Co. [Spokane, WA, USA] | 1947 (1 year) | ||
| Kin-Chan | |||
| KinderMagic Soft. | 1993 (1 year) | ||
| Kindersoft | 1983 to 1984 (2 years) | ||
| Kinderware, Inc. | 1989 to 1993 (5 years) | ||
| Kinesoft | 1995 to 1998 (4 years) | ||
| King | 2007 to 2018 (12 years) | ||
| King & Co. [Chicago, IL, USA] | 1948 to 1960 (13 years) | ||
| King & Sundwall [Seattle, WA, USA] | 1903 (1 year) | ||
| King Amusement Co. [Mount Clemens, MI, USA] | 1952 to 1953 (2 years) | ||
| King Cruces Soft. | 1986 (1 year) | ||
| King Dice | 1984 (1 year) | ||
| King Ec Soft. | 1987 (1 year) | ||
| King Equipment Corp. | 1933 to 1934 (2 years) | ||
| King Game Factories | |||
| King Mfg. Co. [Brooklyn, NY, USA] | |||
| King Products Co. | |||
| King Records Co., Ltd. [Japan] | 1987 to 2008 (22 years) | ||
| King Size | 1987 (1 year) | ||
| King Soft. | 1983 to 1984 (2 years) | ||
| King Tec [taiwan] | |||
| King Tripod Enterprise Co. | |||
| King Vending Machine Co. [Columbus, OH, USA] | 1911 (1 year) | ||
| King, Frank | 1968 (1 year) | ||
| Kingdom Designs | 1990 (1 year) | ||
| Kingformation | 1996 (1 year) | ||
| Kingsford | 1980 (1 year) | ||
| Kingsley, Ray | 1984 (1 year) | ||
| Kingsoft GmbH [Germany] | 1982 to 1995 (14 years) | ||
| Kinki Computer Service | 1981 (1 year) | ||
| Kinky Kit & Game | 1985 (1 year) | ||
| Kinmont Mfg. Co. [Los Angeles, CA, USA] | |||
| Kino | |||
| Kino & Hufo | 1989 to 1990 (2 years) | ||
| Kiraly, Erno | |||
| Kiratto. [Japan] | 2001 to 2002 (2 years) | ||
| Kirchhoff [Heilbronn, Germany] | 1959 (1 year) | ||
| Kirchmeyer, E. | 1954 to 1956 (3 years) | ||
| Kirem | 2021 (1 year) | ||
| Kirin Ent. | 1993 to 1995 (3 years) | ||
| Kirk & Co., C.R. | |||
| Kirk, Ted | 1986 to 1987 (2 years) | ||
| Kirkham, Thomas C. [Highland Greek, Canada] | 1892 (1 year) | ||
| Kirsta Computers, Ltd. | 1991 (1 year) | ||
| Kiselev, Sergey | 2010 to 2017 (8 years) | ||
| Kiser Co., A.R. [Charlotte, NC, USA] | 1931 (1 year) | ||
| Kiss Interactive Games [UK] | |||
| Kiss, Csaba | 1987 (1 year) | ||
| Kisshin | |||
| Kistler, Benjamin | 2023 to 2024 (2 years) | ||
| KisVarga, Zsolt | 1989 to 1990 (2 years) | ||
| KIT [Korea] | 1992 (1 year) | ||
| Kitac [Kita Denshi Corp.] [Japan] | 1990 to 2018 (29 years) | ||
| Kitchen Sink Soft. | 1985 (1 year) | ||
| Kitfox Games | 2023 (1 year) | ||
| KitKorp [Elk Grove, IL, USA] | 1985 to 1986 (2 years) | ||
| Kitmaker Ent. | 2019 (1 year) | ||
| Kitronix [Kitset Electronics, Ltd.] [New Zealand] | |||
| Kitty Enterprise | 1986 to 1987 (2 years) | ||
| Kiwako Co., Ltd. [Japan] | 1982 to 1985 (4 years) | ||
| Kiwi | |||
| Kixx [013442] | 1987 to 1994 (8 years) | ||
| Kixx XL [025980] | 1992 to 1995 (4 years) | ||
| Kiya Overseas Industry Co., Ltd. | 1982 to 1984 (3 years) | ||
| Kiya Tsusho | 1983 (1 year) | ||
| Kiyo | 1994 (1 year) | ||
| KJ Corp. | 1987 (1 year) | ||
| KJPB | 1987 to 1992 (6 years) | ||
| Kjølshun-Data | 1990 (1 year) | ||
| KK Soft. Device | 1990 (1 year) | ||
| KKB | 1988 to 1989 (2 years) | ||
| KKI [KK International] [Japan] | 1982 (1 year) | ||
| KKK | 1982 to 1997 (16 years) | ||
| KLab | 2014 to 2018 (5 years) | ||
| Klabater | 2019 to 2024 (6 years) | ||
| Klapauzius | 2004 (1 year) | ||
| KlassiX [013442] | 1988 to 1991 (4 years) | ||
| Klebba Novelty Co. | |||
| Kleetronic | |||
| Klein & Co., Henry [London, England] | 1900 (1 year) | ||
| Klein & Kruger | 1975 (1 year) | ||
| Klein, John & Jeff | 1986 (1 year) | ||
| Klein, Martin J. | 1992 to 1995 (4 years) | ||
| Kleincomputer | 1989 to 1990 (2 years) | ||
| Kleinman, Grumette & Gilbert | 1976 (1 year) | ||
| Kletzker, Said [USA] | 1893 (1 year) | ||
| Klingsor-Werke [Germany] | |||
| KLM | 1994 (1 year) | ||
| Klode Shops | |||
| Klon Co., Ltd. | |||
| Klondike Slot Machine Co. [Cincinnati, OH, USA] | 1899 (1 year) | ||
| Klondyke Prospector Mfg. Co. [Chicago, IL, USA] | 1900 (1 year) | ||
| Kloos, Tom | 1973 (1 year) | ||
| Klopper, H. & Zevenhoven, P. | 1983 (1 year) | ||
| Klovako s. r. o. | 2022 (1 year) | ||
| Kluge Interactive | 2023 (1 year) | ||
| Kluge Strategic | 2024 (1 year) | ||
| Klugel, O.G. [Indianapolis, IN, USA] | 1892 (1 year) | ||
| Klugh Co., L.B. | |||
| Klumpke, W. [Paris, France] | 1902 (1 year) | ||
| Kluwer Technische Boeken B.V. | 1985 (1 year) | ||
| KM Korea Co., Ltd. [Korea] | 1993 (1 year) | ||
| Kmart | 1979 (1 year) | ||
| KMC | 1995 (1 year) | ||
| KMD | 1991 (1 year) | ||
| KMG b.v. [Netherlands] | |||
| KMI Borovo | 1985 to 1987 (3 years) | ||
| KMSpill | 1996 (1 year) | ||
| Knabi Soft | 1988 (1 year) | ||
| KnapNok Games | 2015 (1 year) | ||
| Knapway Devices [Kansas City, MO, USA] | |||
| Kneller, Don | 1986 (1 year) | ||
| Knezek, Dan | 1986 (1 year) | ||
| Knickers | 1989 to 1991 (3 years) | ||
| Knight Novelty Co. [Cliftondale, MA, USA] | 1922 (1 year) | ||
| Knight Soft. | 1984 to 1990 (7 years) | ||
| Knight's Computers | 1981 to 1983 (3 years) | ||
| Knight, H. [Trenton, NJ, USA] | 1892 (1 year) | ||
| Knight, Jesse | |||
| Knighted Computers | 1984 (1 year) | ||
| Knights Enterprises [Denver, CO, USA] | 1970 (1 year) | ||
| KnightSoft [UK] | 1984 to 1985 (2 years) | ||
| Knowledge Adventure, Inc. | 1994 to 2001 (8 years) | ||
| Knowledge Dynamics Corp. | 1993 (1 year) | ||
| Knowles, Alan | 1982 to 1983 (2 years) | ||
| Knowlton, Dallas [Washington, DC, USA] | 1901 (1 year) | ||
| KNT Co., Ltd. [Japan] | 2007 to 2011 (5 years) | ||
| Ko.mo.mo | 1990 (1 year) | ||
| KO_OP | 2023 (1 year) | ||
| Koala | 1980 (1 year) | ||
| Koala Technologies Corp. | 1983 to 1984 (2 years) | ||
| Koalaware | |||
| KOAM | 2000 (1 year) | ||
| Koan | 1986 (1 year) | ||
| Kobayashi Kenichi | |||
| Kobi Co., Ltd. [Japan] | 1998 to 2001 (4 years) | ||
| Kobrahsoft | 1986 to 1992 (7 years) | ||
| Kobunsha [Japan] | 1999 to 2001 (3 years) | ||
| KOCH Media Deutschland GmbH | 1999 to 2022 (24 years) | ||
| Kodak | 1993 to 2002 (10 years) | ||
| Kodansha [Japan] | 1993 to 2003 (11 years) | ||
| KOEI Co., Ltd. [Japan] | 1982 to 2018 (37 years) | ||
| KOEI Corp. [CA, USA] | 1989 to 2008 (20 years) | ||
| KOEI Tecmo America Corp. [CA, USA] | 2011 to 2023 (13 years) | ||
| KOEI Tecmo Europe, Ltd. [UK] | 2012 to 2023 (12 years) | ||
| KOEI Tecmo Games Co., Ltd. [Japan] | 2008 to 2023 (16 years) | ||
| Koenig, Ron | 1988 (1 year) | ||
| Koenig-Bellovin-Yalow | 1971 (1 year) | ||
| KOGA [Korea] | 1995 to 1998 (4 years) | ||
| Kogado Studio [Japan] | 1985 to 1997 (13 years) | ||
| Kogaku System | |||
| Kohgaku-Sha Co.,Ltd. | 1979 to 1987 (9 years) | ||
| Kokanosky, Bernard [France] | 1984 (1 year) | ||
| Kokopeli Digital Studios | 1996 to 1997 (2 years) | ||
| Kolomna | 1988 (1 year) | ||
| Komax, Inc. | 1986 (1 year) | ||
| Komaya Co., Ltd. [Japan] | 1980 to 2011 (32 years) | ||
| Kometa Kimiaki | 1995 (1 year) | ||
| Komplett Flipper | 1985 (1 year) | ||
| Komppa, Jari | 2016 (1 year) | ||
| Kompsoft | |||
| Komputer Dynamics Corp. [Indianapolis, IN, USA] | 1975 (1 year) | ||
| Komtek Technologies, Ltd. | 1983 (1 year) | ||
| Komuse Co. [Korea] | 2007 to 2017 (11 years) | ||
| Kon | 2006 (1 year) | ||
| Kon Tiki | 1992 (1 year) | ||
| Konami Amusement Co., Ltd. | 2024 (1 year) | ||
| Konami Amusement Co., Ltd. [Japan] | 2015 to 2024 (10 years) | ||
| Konami Amusement of Europe [Middlesex, England] | 2000 (1 year) | ||
| Konami Australia Pty, Ltd. [Botany NSW, Australia] | 1997 to 1999 (3 years) | ||
| Konami Co., Ltd. [Japan] | 1989 to 2000 (12 years) | ||
| Konami Computer Ent. [Japan] | 1999 to 2004 (6 years) | ||
| Konami Corp. [Japan] | 2000 to 2009 (10 years) | ||
| Konami Digital Ent. Co., Ltd. | 2004 to 2024 (21 years) | ||
| Konami Europe GmbH [Germany] | 1988 to 2013 (26 years) | ||
| Konami Gaming, Inc. [Las Vegas, NV, USA] | 1998 to 2011 (14 years) | ||
| Konami Industry Co., Ltd. [Japan] | 1975 to 1991 (17 years) | ||
| Konami of America [CA, USA] | 1996 to 2003 (8 years) | ||
| Konami, Inc. [USA] | 1986 to 1996 (11 years) | ||
| Kondakov M. | 1987 (1 year) | ||
| Kondalski, Brian | 1985 (1 year) | ||
| Kone-Klutch Corp. | 1911 (1 year) | ||
| Konetzko & Olzem [Dortmund, Germany] | |||
| Kongregate | 2010 to 2019 (10 years) | ||
| Koni Denshi [Japan] | |||
| Koningshofer & Wolf | 1974 (1 year) | ||
| Konix Computer Products | 1986 (1 year) | ||
| Kononov Yu.O. [Russia] | 1987 (1 year) | ||
| Kontrast [Germany] | |||
| Kool Kizz [Japan] | 1996 to 2002 (7 years) | ||
| Koplo Sales & Supply Co. [Chicago, IL, USA] | 1940 to 1941 (2 years) | ||
| Kopy-Kat Soft. | |||
| Korea Elec. | 2003 (1 year) | ||
| Korea Media Link | 1998 (1 year) | ||
| Korea Soft Bank | 1986 (1 year) | ||
| Korea Telecom | 1995 to 2001 (7 years) | ||
| Koreal Info Net Co., Ltd. | 2000 (1 year) | ||
| Korex | |||
| Korg | 1980 to 2002 (23 years) | ||
| Korte, H. [Solingen, Germany] | |||
| Kortink, John | 2005 to 2019 (15 years) | ||
| KOS | 1994 (1 year) | ||
| Kosaido Publishing | 1980 to 1984 (5 years) | ||
| Kosmos | 1979 (1 year) | ||
| Kosmos Soft., Ltd. | 1983 to 1993 (11 years) | ||
| Kosuka Co., Ltd. | 1983 (1 year) | ||
| Kotai | 2012 (1 year) | ||
| Kotobuki Raison | 1984 (1 year) | ||
| Kotobuki System Co., Ltd. | 2001 to 2003 (3 years) | ||
| Kotok & McCarthy | 1962 (1 year) | ||
| Kotter, John | 1983 (1 year) | ||
| Kouga Soft. | 1988 to 1989 (2 years) | ||
| Koulun Erityispalvelu Oy | 1985 to 1989 (5 years) | ||
| Koumajutsu | 1990 (1 year) | ||
| Kousarukui | |||
| Kouwenhoven, Peter | 1978 (1 year) | ||
| Kovács, József | |||
| Kowloon Nights | 2024 (1 year) | ||
| Koyama, Hiroshi | |||
| Kozu System | 1989 (1 year) | ||
| KPE [Konami Group] [Japan] | 2006 to 2017 (12 years) | ||
| KPW Soft. | 1987 (1 year) | ||
| KR Games | 2023 (1 year) | ||
| Kraft, Charles H. [Salt Lake City, UT, USA] | 1896 to 1899 (4 years) | ||
| Krafton, Inc. | 2022 (1 year) | ||
| Krafts Automatics Ltd [London, England] | 1954 to 1960 (7 years) | ||
| Krah, Jason | |||
| Krahe, Alfred | 1950 to 1957 (8 years) | ||
| Krajowe Wydawnictwo Czasopism | |||
| Kralizec | 2004 to 2012 (9 years) | ||
| Kramer Mfg. Co. | 1938 (1 year) | ||
| Kramer Mfg. Co., Inc., M. [Lakewood, NJ, USA] | 1982 to 1987 (6 years) | ||
| Krapivin, Dmitry | 2019 (1 year) | ||
| Krazy Ball Mfg. Co. | |||
| Krea Medie | 2007 (1 year) | ||
| Krebs, Rick | 1985 (1 year) | ||
| Krehbiel, Courtney E. | 1987 (1 year) | ||
| Kreiter | |||
| Krell Soft. | 1980 to 1987 (8 years) | ||
| KRGSoft [Korea] | 1996 (1 year) | ||
| Krijnen, G.J. | |||
| Krill 0 | 2014 (1 year) | ||
| Krisalis Soft., Ltd. | 1988 to 1995 (8 years) | ||
| Kriss-Sport [Zory, Poland] | 2001 to 2007 (7 years) | ||
| KRM | 1991 (1 year) | ||
| Kruse, A.H.F. [Portland, OR, USA] | 1904 to 1914 (11 years) | ||
| Krypton Force, Ltd. | 1983 to 1985 (3 years) | ||
| Kryptronic | 1984 (1 year) | ||
| KS Corp. | 1991 to 1992 (2 years) | ||
| KS Media [Korea] | 1998 (1 year) | ||
| KSA | 1988 to 1990 (3 years) | ||
| KSG [Japan] | 2004 (1 year) | ||
| KSK [Kure Soft. Koubou] [Japan] | 1986 to 1996 (11 years) | ||
| KSS Media Ent. Co. [Japan] | 1993 to 2001 (9 years) | ||
| KT Technology | |||
| KTH [Korea] | 2006 (1 year) | ||
| KTX Soft. | 2016 (1 year) | ||
| Kuba | 1994 to 1995 (2 years) | ||
| Kudos [Russia] | 2010 to 2012 (3 years) | ||
| Kue-Golf Co. [Greensboro, NC, USA] | 1930 (1 year) | ||
| Kugenuma Soft | 1990 (1 year) | ||
| Kuk Je Academy | 1991 (1 year) | ||
| Kukan | 1994 (1 year) | ||
| Kuki [Japan] | 1996 (1 year) | ||
| Kukulcan [CPC-Power] | 1984 to 2013 (30 years) | ||
| Kuma Computers, Ltd. [England] | 1983 to 1986 (4 years) | ||
| Kuma Soft. | 1985 (1 year) | ||
| Kumon Publishing Co., Ltd. | 2001 (1 year) | ||
| Kunabi Brother GmbH | 2015 (1 year) | ||
| Kunesh, Dan A. | 1984 (1 year) | ||
| KUNI Soft. [Japan] | 1990 to 1992 (3 years) | ||
| Kunkel Metal Products Co. [Los Angeles, CA, USA] | |||
| Kuns, Kenneth Elroy [Chicago, IL, USA] | 1921 (1 year) | ||
| Kunugi J. | |||
| Kunze, Frank | 1994 to 1997 (4 years) | ||
| Kunzelmann, P. | 1925 (1 year) | ||
| Kuperberg, Greg | 1983 (1 year) | ||
| Kupidon | 2004 to 2005 (2 years) | ||
| Kur, Lukasz & M-Tee | |||
| Kural Electric, Ltd. | 1981 (1 year) | ||
| Kurbelpower Megasoft | 1990 (1 year) | ||
| Kurimoto Kenya | |||
| Kuris, Anatoly | 2019 (1 year) | ||
| Kurland, R. D. | 1975 (1 year) | ||
| Kurt & Yan Soft. | 1984 (1 year) | ||
| Kurtz, Ted | 1983 (1 year) | ||
| Kurzweil Computer Products | 1985 (1 year) | ||
| Kushnier, Ron | 1977 (1 year) | ||
| Kusuno | 1973 to 2009 (37 years) | ||
| Kuwaki Ryuji | |||
| Kuwata, Y. [Japan] | 1984 (1 year) | ||
| Kuypers, Ed | 1985 (1 year) | ||
| KV | 1991 (1 year) | ||
| Kvaleberg, Egel | 1987 (1 year) | ||
| Kvazar | 1996 (1 year) | ||
| KW Computing | 1984 (1 year) | ||
| KW Soft. | 1984 to 1985 (2 years) | ||
| Kwalee, Ltd. | 2023 (1 year) | ||
| Kwang Yih Technology Dev. Co. [Taichung City, Taiwan] | |||
| Kwerty Soft. | |||
| KWP [Japan] | 1989 (1 year) | ||
| KYAT | 1991 (1 year) | ||
| Kyilkhor Creation [Paris, France] | 1987 (1 year) | ||
| Kyocera | |||
| Kyocera Unison | 1987 (1 year) | ||
| Kyodai Soft. Marketing, Inc. | 1989 to 1990 (2 years) | ||
| Kyodo Tsucho Co., Ltd. [Japan] | |||
| Kyoei [Japan] | 1981 (1 year) | ||
| Kyogoku [Japan] | |||
| Kyoh K. Co., Ltd. | 1993 (1 year) | ||
| Kyoraku Sangyo [Japan] | 1992 to 2017 (26 years) | ||
| Kyoto Media [Japan] | 1986 to 1991 (6 years) | ||
| Kyouiku Shuppan | 1991 (1 year) | ||
| Kyouiku Soft Kenkyuusho | 1992 (1 year) | ||
| Kyoushirou | 1988 (1 year) | ||
| Kyugo [Japan] | 1985 to 1991 (7 years) | ||
| KZ-S | |||
| KZH | |||
| KZO | |||
| Kölner Automaten-Fabrik [Cologne, Germany] | |||
| Körting | 1979 (1 year) | ||
| Köth, Matthias | 1997 (1 year) |