Valve showed a graph that proves how many users are online on Steam at the same time. It recently hit 14m online users, setting a record number.
Steam, Valve’s digital distribution platform has reached over 14.2 million active users being logged into its service at the same time. This was hit yesterday and comes after the Steam Christmas sale. I would imagine many people got Steam gift cards for Christmas!
As for the game stats, while GTA V, Civ V, and Football Manager 2017 were being played by between 50,000 and 100,000 users, the biggest games were in fact valves own, DOTA 2 and CS:GO.
DOTA 2 was hit at 671,3363 and Counter Strike: Global Offensive with 951,942.
A very impressive number, and already it seems like 2017 is starting out with some very high numbers hitting developers and companies. A huge congratulations to Valve indeed!
Source: Steam Stats Page