| 'Z' Companies | Period (Timeline) | Item #: Game | Item #: Non-Game |
|---|---|---|---|
| Z Games | 2000 (1 year) | ||
| Z-Circle | 1987 to 1990 (4 years) | ||
| Z-Delta Swiftware | 1989 (1 year) | ||
| Z-Soft. | 2021 (1 year) | ||
| Z-ware | 1990 to 1992 (3 years) | ||
| Z80 ASMer | 2021 (1 year) | ||
| Z80 Pros | 1988 (1 year) | ||
| Z800 [Netherlands] | |||
| Z88 User Group | 1989 (1 year) | ||
| ZA/UM | 2021 (1 year) | ||
| Zaccaria [Bologna, Italy] | 1974 to 1987 (14 years) | ||
| Zack | 1996 (1 year) | ||
| Zafi Chip | 1984 to 1987 (4 years) | ||
| Zafiro Soft. Div. [Spain] | 1985 to 1989 (5 years) | ||
| Zagler, Ludwig | 1977 (1 year) | ||
| ZainSoft. [Japan] | 1989 to 1990 (2 years) | ||
| Zakharov, D. | 1989 (1 year) | ||
| Zakym | 2022 (1 year) | ||
| Zammit, C.John | 1995 (1 year) | ||
| Zamperla, Antonio [Italy] | 1976 to 1990 (15 years) | ||
| Zamuse | 1993 to 1994 (2 years) | ||
| Zangrila Soft. | |||
| Zankle Soft | 2021 (1 year) | ||
| Zanussi Elettronica | 1983 to 1995 (13 years) | ||
| ZAP | 1984 to 1985 (2 years) | ||
| Zapp Mfg. Co., A. [Dallas, TX, USA] | 1931 (1 year) | ||
| Zavod BRA | 1989 (1 year) | ||
| Zawisza, Norman S. | 1990 (1 year) | ||
| Zbrojovka Brno | 1989 (1 year) | ||
| ZCT Systems Group | |||
| ZD Corp. [Russia] | 1989 to 1990 (2 years) | ||
| Zeboyd Games | 2021 (1 year) | ||
| Zebra Systems, Inc. | 1983 to 1985 (3 years) | ||
| Zecreator [France] | 2004 (1 year) | ||
| Zedcor, Inc. | 1987 (1 year) | ||
| Zeebo, Inc. [Brazil] | 2009 (1 year) | ||
| Zeit [Japan] | 1987 to 1992 (6 years) | ||
| Zellers, Inc. [Montreal, Quebec] | |||
| Zelman, Paul M. | 1985 (1 year) | ||
| Zemina [Korea] | 1984 to 1996 (13 years) | ||
| Zen Studios | 2013 to 2023 (11 years) | ||
| ZeniMax Europe, Ltd. | 2008 to 2023 (16 years) | ||
| Zenith Data Systems | 1982 to 1987 (6 years) | ||
| Zenith Mfg. Co. | 1932 (1 year) | ||
| Zenitone, Ltd. | 1987 (1 year) | ||
| Zenitone-Microsec, Ltd. | 1979 (1 year) | ||
| Zeno Button Co. [Indianapolis, USA] | 1905 (1 year) | ||
| Zeno Mfg. Co. [Chicago, IL, USA] | 1902 to 1908 (7 years) | ||
| Zenobi Soft. | 1984 to 1997 (14 years) | ||
| Zenobia Co., Inc. [New York, NY, USA] | 1932 (1 year) | ||
| Zenryutsu [Japan] | 1986 to 1991 (6 years) | ||
| Zentec | 1979 (1 year) | ||
| Zeon | 1992 (1 year) | ||
| ZEOS International, Ltd. | |||
| Zepher [Japan] | |||
| Zephyr Services [Pittsburgh, PA, USA] | 1983 to 1985 (3 years) | ||
| Zeppelin Games | 1984 to 1993 (10 years) | ||
| Zeppelin Platinum | 1990 to 1993 (4 years) | ||
| Zeppelin Premier | 1992 to 1993 (2 years) | ||
| ZeptoLab UK, Ltd. | 2023 (1 year) | ||
| Zeroplus Technology Co., Ltd. [Taiwan] | 2011 (1 year) | ||
| Zeropolis Element | 2007 (1 year) | ||
| ZeroTeam | 2012 (1 year) | ||
| Zerouno Games | 2019 (1 year) | ||
| Zest Gaming spa [Lecco, Lombardy, Italy] | 2009 to 2010 (2 years) | ||
| Zeta Soft. | 1982 (1 year) | ||
| Zeus | 1995 (1 year) | ||
| Zeus [Zorba Equipment Users' Society] | 1983 to 1986 (4 years) | ||
| ZGames | |||
| Zhin | 1995 to 1998 (4 years) | ||
| Zhongji Technology Co.,Ltd. [Hunan Province, China] | |||
| Zhongshan Chuangyu Amusement Equipment Co., Ltd. [China] | |||
| Zhongshan Guang Yang | 2010 (1 year) | ||
| Ziatech | 1994 (1 year) | ||
| ZIDA | |||
| Ziebell, Robert [Oshkosh, WI, USA] | 1905 (1 year) | ||
| Zierick Machine Works, F.R. [Newark, NY, USA] | 1926 (1 year) | ||
| Ziff Davis Media | 2006 to 2007 (2 years) | ||
| Ziff-Davis Publishing Co. | 1977 to 1978 (2 years) | ||
| Zigarren u. Automatenges, m.b.H. [Karlsruhe, Germany] | |||
| Ziggurat Interactive | 2021 to 2024 (4 years) | ||
| ZIGO Watt [Japan] | 1992 (1 year) | ||
| Zigurat Soft. [Spain] | 1985 to 1992 (8 years) | ||
| Zila | |||
| Zilec | 1987 (1 year) | ||
| Zilec Electronics | 1981 to 1984 (4 years) | ||
| Zilec Games | 1979 to 1980 (2 years) | ||
| Zilec-Zenitone | 1982 to 1986 (5 years) | ||
| ZiMAG [Gardena, CA, USA] | 1983 (1 year) | ||
| Zimmerman, Jim G. | 1995 (1 year) | ||
| Zimmerman, Ray | 1992 (1 year) | ||
| Zimmermann Musikverlag [Leipzig, Germany] | |||
| ZIO Interactive, Inc. | 2001 (1 year) | ||
| Ziogas | 1992 (1 year) | ||
| Zip Cracking Factories | 1988 (1 year) | ||
| Zircon | 1978 to 1981 (4 years) | ||
| Zircon Soft. | 1984 to 1985 (2 years) | ||
| Zirok [Brazil] | 1983 (1 year) | ||
| Zitga Pte., Ltd. | 2017 to 2018 (2 years) | ||
| Zitro Factory, S.L. | |||
| Zizzle | 2006 to 2008 (3 years) | ||
| Zlash Studios | 2010 (1 year) | ||
| ZMKMF | 1986 (1 year) | ||
| ZO Svazarmu | 1985 to 1989 (5 years) | ||
| Zobrist & Carison | 1974 (1 year) | ||
| Zobrist, Albert Lindsey | 1968 (1 year) | ||
| Zodiac | |||
| Zodiac Network | |||
| Zodiac Soft. | 1987 to 1988 (2 years) | ||
| Zombie Crackers | 1986 (1 year) | ||
| Zone Interactive | |||
| Zonic | |||
| Zoo Digital Publishing | 2002 to 2009 (8 years) | ||
| Zoo Games | 2009 (1 year) | ||
| Zoom [Japan] | 1989 to 2010 (22 years) | ||
| Zoom Soft. [Dallas, TX, USA] | 1991 to 1993 (3 years) | ||
| Zoom Telephonics | 1983 to 1984 (2 years) | ||
| Zoom-X [Japan] | 1998 (1 year) | ||
| Zordix AB | 2018 (1 year) | ||
| Zosya Ent. | 2019 to 2023 (5 years) | ||
| Zotov AJ | 1988 (1 year) | ||
| Zoutewelle Multimedia | 1995 (1 year) | ||
| Zowie Distributing Co., Inc. [Chicago, IL, USA] | 1932 (1 year) | ||
| Zoxxed | |||
| ZozoSoft | 2016 (1 year) | ||
| ZP | 1992 (1 year) | ||
| ZPA Novy Bor | |||
| ZRL | 1982 (1 year) | ||
| ZSoft | 2002 (1 year) | ||
| Zsolt [Hungary] | 1987 (1 year) | ||
| Zuchowski, Tom | 1985 to 1988 (4 years) | ||
| Zushi Games, Ltd. | 2010 (1 year) | ||
| Zutano Games | 2018 (1 year) | ||
| Zuul | 1990 to 2004 (15 years) | ||
| Zuum d.o.o. [Kranj, Slovenia] | 2009 to 2010 (2 years) | ||
| ZUXXEZ Ent. AG | 2009 (1 year) | ||
| Zweisten | 1992 (1 year) | ||
| ZX Africa | |||
| ZX Computing | 1983 to 1987 (5 years) | ||
| ZX Data [Denmark] | 1983 to 1984 (2 years) | ||
| ZX Files | 1997 to 1998 (2 years) | ||
| ZX-Guaranteed | 1982 to 1988 (7 years) | ||
| ZX-SOFT Brasil, Ltda. | 1989 (1 year) | ||
| ZX81 Keyboard Adventure | 2019 (1 year) | ||
| ZXF | 2006 (1 year) | ||
| ZXIF | 2003 to 2006 (4 years) | ||
| Zykron Co. | 1986 (1 year) | ||
| Zynga | 2008 to 2019 (12 years) | ||
| Zyrinx | 1993 (1 year) | ||
| Zyryanov A.V. | 1988 (1 year) | ||
| Zytech | 1994 to 1995 (2 years) | ||
| Zytronics, Inc. [Miami, FL, USA] | |||
| ZyX [Japan] | 1994 to 2009 (16 years) | ||
| ZYX-Music GmbH [Germany] | 1994 (1 year) | ||
| ZZ Top Soft | 1991 to 1992 (2 years) | ||
| ZZAP!, Ltd. | 1990 to 1991 (2 years) |