Get the free main game first:
https://www.epicgames.com/store/en-US/p/rogue-company
Then the Addon :
https://www.epicgames.com/store/en-US/p/rogue-company--deadly-apparition-starter-pack
https://www.epicgames.com/store/en-US/p/rogue-company
Then the Addon :
https://www.epicgames.com/store/en-US/p/rogue-company--deadly-apparition-starter-pack