Slitherine

I can register my base game and Allied core but there's no code for the Mega campaign....
Please help me get the Mega Campaign on Steam.....

from what i can remember, you need to register each item as there wasn't 1 key for the whole lot, but maybe wrong, so have asked and can amend this later if so

The Grand Campaign Mega Pack is the compilation of Panzer Corps Grand Campaign DLC, so you'll need to register separately its serial number on each of the 10 individual Grand Campaigns (Panzer Corps Grand Campaign '39, Panzer Corps Grand Campaign '40, Panzer Corps Grand Campaign '41, and so forth) in your Slitherine account and redeem Steam keys for each.

Thank you, thank you, thank you!!!