The number of games released on Steam could top 5,000 in 2017—the most ever in a single year
http://www.pcgamer.com/the-number-of-games-published-on-steam-could-top-5000-this-yearthe-most-ever/
It's no wonder your Steam backlog keeps growing: the platform is releasing more games than ever before. According to analyst Daniel Ahmad, of Niko Partners, the number of games released on the platform so far this year has already surpassed the total for the whole of 2015.
Around 1,300 games have popped up since June's launch of Steam Direct, the replacement for Steam Greenlight that lets developers publish on Steam without passing through an approval process. If that pace carries on then the number of games released this year could top 5,000 for the first time.