Yeah, Intel HD Graphics are not supported even with Windows, but I have heard that the game runs ok on low settings. Linux and Mac do have worse performance than Windows at the moment but maybe you should wait a couple more days (Patch 1.0.7b should fix fps issues) and ask about linux performance on Paradox forums? 🙂
Fedora 22 (Linux 4.19, Mesa 10.4.3) Intel Core i5-4200U, HD Graphics 4400. I’ve heard about strong graphical issues with Linux on Intel graphics (not seeing Streets etc.). Will the game be playable on my system?