Publishers
System
8-Bit Guy
Abacus Software
Access Software
Adamsoft
American Action
Amersoft
Anco
Argus Specialist Publications (Your Commodore)
Ariolasoft
Audiogenic [ASL]
Berkeley Softworks > GeoWorks
Bodéns Data
Cappco
Commodore Business Machines [CBM]
Courbois Software Beuningen [C.S.B.]
CRL
Cymbal Software (BCI Software)
Data Becker
DATA HOME Software Amsterdam / R.Smit Software Import
Dialog Software
Digital Solutions Inc.
Dolphin Dos Vertrieb
EDV-Service Ellinger (Public Domain)
Förlagsgruppen
Financial Systems Software Limited (F.S.S.L)
Free Spirit Software
Geos Club Regio Thüringen
Glentop Publishers Ltd.
Handic Software / Datatronic
Hands On Software
Holger Stöhr
HOLTKÖTTER GmbH
Homebrew versions
Horasoft
Human Engineered Software [HES]
Independent Softworks
Infocom
Innovative Computer Accessories (INCA)
Jens Weigt
K & K Software
Kracker Jax Protection Busters (KJPB)
Low Spark
Mantra Software
Markt & Technik
Markt & Technik (C128 Software)
Markt & Technik (C128ér Software Extra)
Markt & Technik (Commodore Sachbuch)
Mastertronic
Micro Designs
Micro-Ware Distributing
Microcomputer Club Nederland [MCN]
Microfex
Microtrend
Music Sales Limited
NorthWest Software
Patech Software Inc.
Precision Software
Pro-Line Software
Professional Software Inc. (PSI)
Progressive Peripherals & Software
Radarsoft
Rex Datentechnik GMBH
RML Labs
Robcom / Robtek / Share Operating Services
Robcom / Robtek / Share Operating Services (Ten Collection)
Roger Wagner Publishing, Inc. / Southwestern data systems
Rudolf Sanda
SM Software Inc
SOGWAP Software
Spinnaker Software (Working Series)
Sybex
Systems Software Oxford Ltd. (SSOL)
Taito
Timeworks
Viza Software
Wprosoft
Xetec
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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