Hello soldiers!
We had some issues with our Steam store regarding our special Editions for Isonzo.
Luckily these issues are now resolved and you can purchase your Deluxe & Collector's Edition!
https://store.steampowered.com/app/1556790/Isonzo/
Thank you for your patience !
Support
Please know that we're aware of the issues you're experiencing and are already working on fixes!