Company of Heroes 2 was ported by Feral to Linux last August. Now The Western Front Armies expansion will be released next week on 28 January. The game was originally released for Windows back during the summer of 2014.
The Linux port of CoH2: The Western Front Armies calls for having Intel Iris Pro graphics on the open-source driver or a NVIDIA GeForce GTX 600 series graphics card with the proprietary driver.
This standalone game to Company of Heroes 2 sells for $20 USD on Steam.