There is a new check box on the Game Creation and Game windows that allows you to specify that all new races discovered during the normal exploration process will be non-TN. Whether they are NPRs or not will depend on the existing 'Generate Races as NPRs' check box.
I don't understand, what other option for non-TN race can be except for NPRs? I know it suppose to be self explanatory, but I keep stumbling over the definitions\functions. To my understanding, we have Player Races, Non-Player Races, and Aliens:
* Player Races - Either Humans, or whatever you conjured in SM. All controlled by the player.
* Non-Player Races - Just like Player Races only controlled by the AI.
* Aliens - Ai controlled opponents with interesting quirks.
Also for all purposes an Empire and Race is the same thing. And all empires\races can have several subspecies.
Is there any other variants to the above, and where the non-TN, non-NPR falls