The PC gaming utility, Raptr, keeps track of per-game play time across each of their of their tracked titles. Because it is not locked to Valve, Blizzard, Riot Games, Mojang, and so forth, it compares games that are from different publishers and distribution platforms as long as the software is running. Around once each month, the company shares their findings and gives brief explanations for notable results. Again, these are not sales or download figures. This ranking is decided by the number of hours played.
First, League of Legends continued its reign as most played PC game; in fact, it widened its lead to over one-fifth of all recorded game time (20.55%). This increase was mostly attributed to the game's 4.15 update. Second place, with a significantly less 7.62%, is World of Warcraft. Raptr believes it passed DOTA 2 for two reasons: WoW gained players from their Mists of Pandaria 50%-off promotion and DOTA 2 deflated a little bit after the swell from The International tournament.
Counter-Strike: GO held steady in fourth place and
Smith Smite (Update 09/17/2014: Corrected typo), a free-to-play MOBA from Hi-Rez Studios, jumped five places to fifth place.