I can get some old ass terminal based JRPG and Sims 3 which can barely run on windows working using bottles but I can't get the linux version of Hearts of Iron IV to recognize dlc wtf is this
I haven't played HOI4 on Linux yet, but I've played other PDX games. They have just worked for me. I don't know if you're doing something different, but I just install the DLCs and they are instantly recognized.