2017 was the best year for Valve so far: Steam's share of the market grew to $4.3B, not counting in-apps and DLCs.
— Steam Spy (@Steam_Spy) March 22, 2018
If you're at #GDC18, come to my talk at 4PM at 2005 West for even more numbers and graphs. pic.twitter.com/j4a15aBvpZ