Nienstaedt is definitely the manufacturer of the Match 4 games marketed under the brand name Hilco which are a version of Score Four. The instructions included a specific reference to Nienstaedt by name, and the game board itself with a "British Design Registry No.: 1002841" which was owned by Nienstaedt.
Nienstaedt probably also made the Catch 76 versions of the game. It is unknown if they actually marketed the game. But that is certainly a impassibility in the Asia market (esp. Hong Kong).
Unknown if Nienstaedt manufactured or marketed any other games.