How to buy a Premium Upgrade?

[Servanto Perducci]

Tell me please how to buy a Premium Upgrade? There is a page with it in the additional content, but there is no price with a purchase button. What kind of joke is this?

[Berserk Slayer]

There should be an Add to Cart link on the main page for the game next to the premium upgrade. Click that instead of going to the bundle/upgrade listing

[U.S.S.R.]

Dude, your region is under sanctions, so you can't add this package to your cart. I bought it here https://www.cdkeys.com/doom-the-dark-ages-premium-upgrade-pc-dlc-steam
They accept payment in cryptocurrency. But you need to apply through VPN so that an invoice for payment is generated. I am probably the only one in Russia who bought this package. It is suitable for any Steam region.

[Servanto Perducci]

I am in the Kazakhstan region, after some time the purchase function appeared. Thanks to everyone for the answers.