Slitherine

I have recently bought the mega pack. Do I need Afrika Korps too to have access to all Panzer Corps battles from the German perspective or are all included in the mega pack? Thanks in advance.

They`re different campaigns. Afrika Korps is an the expansion that takes place in Africa. The Mega pack is a collection of the yearly campaigns that came together as DLCs. To my knowledge they only take place in Europe.

You need to buy Panzer Corps first to play:
Panzer Corps > Allied Corps (Steam)
> Afrika Corps (Steam)
> Grand Campaign

Or you can buy them with slitherine store and play:
Allied Corps (Standalone Game/DLC)
Afrika Corps (Standalone Game/DLC) > Grand Campaign
Panzer Corps > Grand Campaign

The Grand Campaign is independent from Afrika or the Vanilla Campaign. It adds a lot of content to those games but you can't mix the campaigns or their units.

Thanks for your replies!