Analysis of information sources in references of the Wikipedia article "Nexus: The Jupiter Incident" in English language version.
Nexus had a long history already before it was published. The game was developed by Mithis, a Hungarian games development studio in Budapest. They had signed the game at the time with German publisher CDV. CDV decided that they wanted a license for the game and they acquired the license for Imperium Galactica. So, the game we know as Nexus would have been Imperium Galactica 3 as far as CDV was concerned.
Nexus had a long history already before it was published. The game was developed by Mithis, a Hungarian games development studio in Budapest. They had signed the game at the time with German publisher CDV. CDV decided that they wanted a license for the game and they acquired the license for Imperium Galactica. So, the game we know as Nexus would have been Imperium Galactica 3 as far as CDV was concerned.