First of all, the CD version of the game must be installed in the host, and the host will install it automatically, but it does not mean that the CD is not needed after installation.

You can't run the game without a CD.

Secondly, if there is no network, it will not affect the single person. As long as you buy a CD, the CD version of the game has no network verification.

However, I can't get the official patch push in the later period.