It is possible. I am not a hardcore gamer, I play occasionally and so far everything went smoothly via Steam, but now my only chance to play is this:

Edit: typo

It's pretty borked on Linux for some people, especially if you have a lower end computer. I understand there are major updates that will take more power, but it's difficult to get consistency from the game whatsoever. I'm guessing the Vulkan renderer for the Source 2 engine needs to be better optimized.