Creators of the Atari 2600.

Bit Corp. is a Taiwanese Company who's generally believed to be the "Mother-Company" behind many labels and distributors.

Bomb was a videogame label under which Onbase Co. released four titles.

Another company (German or Taiwanese?) pirating about four games from other publishers.

This famous Japanese publisher released three original titles for the Atari 2600. The PAL and NTSC versions are easy to identify as the PAL versions use the Gakken Konami label and the NTSC versions use the Konami label (without Gakken).

Belgian company VDI released games, developed (original & hacked) in Taiwan by Gem International Corporation, for the 2600. These releases were brought under the label Home Vision.

Hot Shot was a budget-label of Goliath. In turn Goliath is believed to be connected with the labels Funvision, Ultravision, K-Tel, Zellers, Puzzy and Bit Corp. The exact relation between these labels is still not known.

This division of ITT Schaub Lorenz, manufacturer of electronic consumer goods, jumped in videogame market and released around 8 games. There's a relation with Homevision, though it's unclear if they pirated or licensed their games.

K-Tel Vision, a division of the K-Tel company, only released two titles under its own name. These two games also appeared under labels associated with Goliath.

Producing pornographic videogames during the high of the first videogame era, Mystique was founded by American Multiple Industries and Caballero Control Corporation.

Famous for making board games Parker Brothers became one of the most successful third-party developers.

Yes, before releasing hardware themselves Sega was a third party developer.

Starpath used a memory expansion, expanding the original 128 bytes to an amazing 6.272 bytes, to create some truly outstanding games.

Some of the most sought after games are the late releases of Suntek.

TechnoVision only released three PAL carts. In 1982 this label (of VTL Hong Kong) was planning to release these titles in North America, they never appeared though.

Another original third party developer; Telesys released six titles.

Creators of X-Man.

Five, now difficult to find, cartridges were released by Video Gems.

Most famous for the big double enders.

A label set up by Magnetic Tape International, but again... the relation with Bit Corp. seems obvious.