Steam has surpassed 14 million concurrent users. The milestone was hit early January 7 and peaked at 14,207,039, according to Steam's stats page and yesterday they even passed 14.3 Million.

The most popular game was Dota 2 with the highest number of concurrent users with 950K players. Counter-Strike: Global Offensive followed with 675,195 players, while Grand Theft Auto V rounded out the top three with 116,230. 

It's worth underlining that concurrent users isn't the same as concurrent players. The 14,207,039 number includes users who have Steam running in the background while they're doing other things or away from the PC altogether. Still, the figure is one measurement of Steam's growth over time. 14.3 million concurrent users, representing a growth of 9 million users over 5 years since 2012.