Publishers
System
A.M. Chaudhary
Addictive Games
Adventure International
Adventure Soft (Adventure International UK)
Alligata (Budgie)
Alpha Omega
Alternative Software (199 Range)
Anco
Anirog
Arcadia
Argus Press Software (Tape Computing)
Artic Computing
Atlantis Software
Audiogenic [ASL]
AVS
Beau-Jolly
Bitmap Soft
Bubble Bus Software
Bug-Byte
Cascade Games
Cascade Games (Gamebusters)
CDS Software
CDS Software (Blue Ribbon)
Channel 8 Software
Citisoft Limited
Codemasters
Commodore Business Machines [CBM]
Commodore Data
Commodore Info (Uitgeverij S.A.C.)
Computer Soft Jonigk [CSJ]
Computer World (Softworld)
Computrix Software
Courbois Software Beuningen [C.S.B.]
Creative Sparks
CRL
CRL (The Power House)
Cronosoft
Data Beutner (Stone-Castle)
Data Media
DELA-Elektronik
Dixons
Dotsoft
Duckworth / Ducksoft
Durell
Elite Systems
Elite Systems (Encore)
Elite Systems (Hit Pak)
English Software
Fantasy Software Designs
Fermont (Go Games)
Firebird (Silver 199 Range)
Flashfire
Future was 8bit, The
Gameword
Golden Games
Gremlin Graphics
Homebrew versions
Illusion Software
Imagine
Impex Software
Info Designs (IDI)
Infocom
Interceptor Software (Players)
J.C.L. Software
Jafsoft
Kingsoft
KnightSoft
Llamasoft Software
Macsen Software
Magnificent 7 Software
Majestic Software Products (MSP)
Markt & Technik
Mastertronic
Mastertronic (199 Range)
Mastertronic (Entertainment USA)
Mastertronic (M.A.D.)
Mastertronic (Plus)
Mastertronic (Ricochet)
Melbourne House
Micro Design
Microdeal
Microelectrónica y Control (µec)
Micropool
Midas Marketing
Mother Soft- en hardware Services
Mr. Chip Software
Novagen
Ocean
Ocean (The Hit Squad)
OziSoft
Paxman Promotions
Poly.Play
Prism Leisure
Probe Software
Psytronik Software
Pubblirome
Quellesoft
Razorsoft
recycle me
Robcom / Robtek / Share Operating Services
Robtek (Kingsize)
Romik Software
Rushware
Smith Corona
Software Projects
Solar Software
Sumlock Microware (LiveWire)
Super Sellers
Supersoft
Thunderbirds / Unlimited Paperware
Tri Micro
Trojan Products
Tronic-Verlag (Compute Mit)
Tynesoft
Tynesoft (MicroValue)
U.S. Gold
U.S. Gold (Americana)
U.S. Gold (Kixx)
Unknown
Visiodata (Visiogame)
Visiogame
Visiogame (Play Vision)
YES! Software
Publisher Information and Releases
Robcom / Robtek / Share Operating Services
Started life as Share Operating Services in the Netherlands. (Hyacinthenveld 69, 4613 DL Bergen Op Zoom) as
(source Commodore User Magazine Issue 24 1985-09), moved to the UK and started using the Robcom name.
(36 Marketplace, Falloden Way, London, NW11 6JP (Phone 01-209 0118)

After a few releases the renamed from Robcom to ROBTEK. (End of 1985)
The change on the company name came with the introduction of the Game Killer cartridges if we can trust the adverts.
Publisher Information at Amiga Hall of Light also notes ROBTEK as the company behind a few games.


Game Killer Cartridge

On powerup a real intro pops up. It is packed with MC CRACKEN COMPRESSOR 1.3 and includes a scroller reading:

Copyright (c) M.F.Zonnefeld/P.A.Share - ROBTEK 1986. Graphics by J.W.A.Kampstra. Music by R.Hubbard. Exclusively licensed to MASTERTRONIC Int. for America, Canada and Australia under the name 'INFINITY MACHINE'. Manufactured by RAM ELECTRONICS....GAME KILLER gives you the advantage over you computer. Break through your game with ROBTEKS GAME KILLER.....HIT SPACE TO CONTINUE....

This article from Zzap! also notes the tune by Rob Hubbard and this excellent article at Commodore Zone about Rob reads:

In 1986 the company Robtek marketed a new product called Game Killer for the Commodore 64. It was a cartridge-based device that allowed gamers to cheat when playing certain games that contained sprite collision code. The cartridge would allow the sprite collision to be switched off, which in effect meant that you could complete a game because the in-game enemies could never kill your character!

Unfortunately it did not work that well as it was only useful for certain games due to the software method used.

Robtek asked Hubbard to compose the theme music for the software. It was the only commercial software utility that contained a Hubbard soundtrack and what a soundtrack it is! It’s actually a remix of some music he did for the Human Race (Mastertronic 1986).

It has a memorable chorus line, which you won’t easily forget, it’s one of those tunes that just seems to stay in your head even after all these years - I can still hear the tune now! As usual it complements the software well and is most appropriate.
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