The Counter-Strike series are some of the most successful multiplayer first person shooter games of all time on their native home of the PC. Starting life as a mod for the original Half-Life, the game enjoyed widespread popularity and spawned a series of variants which remain popular on Steam today.
It looks like a new title could be on the way, though, as a number of sources have been teasing the game's existence for a few days. E-Sports Entertainment simply posted "Counter-Strike: Global Offensive... More info in the morning." earlier today on their Facebook page. There's an entire thread on the Steam forums discussing the game. Valve employee and Counter-Strike co-creator Jess Cliffe popped his head in to this thread to correct the community members calling it "Global Operation," then disappeared again like a ninja. And Electronic Sports League product manager Bastian Veiser tweeted yesterday that he'd spent all day playing "the new Counterstrike Global Offensive at Valve HQ."
Few further details are forthcoming right now, but reports suggest that Valve has been flying out a number of top Counter-Strike community members to their headquarters in Seattle to discuss the future of the game. Those that have been able to dribble out some information without being hunted down by PR agencies have suggested that the new game will offer 5v5 play and be largely aimed at competitive e-sports players. (Source)
If E-Sports Entertainment post is to be believed, we can expect more information today or tomorrow, and perhaps we'll get a glimpse of the new game -- if indeed it is a new game -- at Gamescom next week.