Matt, you always manage to get things a little bit wrong.
Please research before you post your answers to others, and possibly link to where have learned the fact to be so.
Cause, as much as your efforts to help out are appreciated, you often don't quite get it right.
Nothing personal, mate. Just saying it as it is..
Anyway..
Here's your answer railways:
Paradox boxed versions require STEAM and a one time internet activation (after this one time activation you can then play the game offline without internet activation every next time you play it.)
The other boxed versions don't have STEAM integration.
Regards,
Fred