Valve's online PC gaming platform Steam has reached another new concurrent user record.

On October 31, more than 12.5 million logged in at the same time, according to the Steam Stats page. That represents a new all-time high, surpassing 10.7 million in earlier in October, 10 million in June, which was up from 9.5 million in May.

Steam is one of the most prominent platforms in all of PC gaming. By Valve's latest count, it had more than 125 million registered users and 6,000-plus games. The top titles right now are Dota 2, Counter-Strike: Global Offensive, Team Fortress 2, and Grand Theft Auto V. Check out the top 10 Steam titles below.

Looking ahead, Valve hardware--including the Steam Controller, Steam Link, and Steam Machines--go on sale later this month. Check out GameSpot's roundup for everything you need to know.